What does "act" mean?
An instance of a certain standardized college admissions test in the United States, originally called the American College Test.
Act
/ækt/ adv, name, noun, verb
adv, name, noun, verb ·Very common ·Middle school level
Meaning at a glance
- Primary sense: An instance of a certain standardized college admissions test in the United States, originally called the American College Test.
- Grammar: act is listed as adv, name, noun, verb.
- Nearest alternatives: action, deed, enactment, accomplish.
- Useful contrasts: forbearing, italian scena, well worn refrain.
- Usage evidence: You must act in accordance with the rules.
How to use "act"
- Start with the primary definition, then check the part of speech before placing the word in a sentence.
- Compare nearby synonyms to make sure "act" carries the exact meaning, tone, and strength you need.
- Use the example sentence as a context check. If your sentence uses the word differently, confirm that the grammar still fits.
Meaning check
- Does the word fit the sentence's grammar?
- Does it match the intended tone rather than only the dictionary definition?
- Would a simpler synonym be clearer for the reader?
- Is there enough surrounding context to prevent ambiguity?
Source and review context
This entry combines structured lexical data with WordToolSet review checks. Definitions, examples, synonyms, and usage notes may come from different source tables, so the page is designed to show evidence from more than one angle before you rely on "act" in a final draft.
If a word has several senses, prefer the sense that matches your sentence's grammar and surrounding context. A correct definition can still be the wrong choice when the sentence needs a different register, emphasis, or level of specificity.
Before you rely on this definition
Read the first definition as a starting point, then check the example, synonyms, and part of speech before treating "act" as the right word for your sentence.
If your draft is formal, technical, persuasive, or sensitive, compare "act" with a nearby alternative so the final choice matches both meaning and reader expectation.
Compare nearby meanings
- Use synonyms when you need a softer, stronger, simpler, or more specific word.
- Use antonyms to check the boundary of the meaning and avoid accidental contrast.
- Use the example sentence to confirm the word behaves naturally in context.
- Keep the original wording when a replacement adds complexity without improving precision.
Definition decision workflow
1. Identify the role
Check whether "act" is acting as adv, name, noun, verb in your sentence. A definition is only useful when the grammar matches the way the word is being used.
2. Test the nearest option
Compare it with "action" and other nearby choices to see whether the sentence needs a softer, stronger, or more familiar word.
3. Confirm with context
Use the example sentence below as an evidence check, then read your own sentence out loud to catch tone or rhythm problems.
Review note: Definition pages are checked for source coverage, sentence evidence, synonym support, and editorial insight before they are treated as approval-ready pages. If the evidence is too thin, the page remains available to users but is kept out of the approval-facing indexed inventory.
Final meaning check
Before publishing a sentence with "act", ask whether the word helps the reader understand the idea faster. A precise word should reduce confusion, not simply make the sentence look more polished.
When the definition, synonym evidence, and example context point in the same direction, the word is usually a safer choice. When they conflict, revise the sentence or choose a clearer alternative.
Definitions
Noun
- 1 An instance of a certain standardized college admissions test in the United States, originally called the American College Test. countable
- 2 Something done, a deed. countable
"an act of goodwill"
- 3 Ellipsis of Act of Parliament. abbreviation, alt-of, ellipsis
- 4 something that people do or cause to happen wordnet
- 5 Acronym of acceptance and commitment therapy. abbreviation, acronym, alt-of, uncountable
Show 17 more definitions
- 6 Actuality. obsolete, uncountable
"The seeds of plants are not at first in act, but in possibility, what they afterward grow to be."
- 7 a legal document codifying the result of deliberations of a committee or society or legislative body wordnet
- 8 Something done once and for all, as distinguished from a work. countable, uncountable
- 9 a short performance that is part of a longer program wordnet
- 10 A product of a legislative body, a statute. countable
"But was it responsible governance to pass the Longitude Act without other efforts to protect British seamen? Or might it have been subterfuge—a disingenuous attempt to shift attention away from the realities of their life at sea."
- 11 a subdivision of a play or opera or ballet wordnet
- 12 (In the United States) A legislative proposal, a bill that has not yet become law. countable
"Under current law, employers can drag out the union election process... Under the PRO Act, workers and the NLRB set union election procedures. The employer is not involved."
- 13 a manifestation of insincerity wordnet
- 14 The process of doing something. countable, uncountable
"He was caught in the act of stealing."
- 15 A formal or official record of something done. countable
- 16 A division of a theatrical performance. countable
"“H'm !” he said, “so, so—it is a tragedy in a prologue and three acts. I am going down this afternoon to see the curtain fall for the third time on what […] will prove a good burlesque ; but it all began dramatically enough. It was last Saturday […] that two boys, playing in the little spinney just outside Wembley Park Station, came across three large parcels done up in American cloth. […]”"
- 17 A performer or performers in a show. countable
"Which act did you prefer? The soloist or the band?"
- 18 Any organized activity. countable
"The minute you let it be known you're planning a sales campaign everybody wants to get into the act."
- 19 A display of behaviour. countable
- 20 A display of behaviour.; A display of behaviour meant to deceive. countable
"to put on an act"
- 21 A thesis maintained in public, in some English universities, by a candidate for a degree, or to show the proficiency of a student. countable, uncountable
- 22 Ellipsis of act of parliament. abbreviation, alt-of, countable, ellipsis, uncountable
Verb
- 1 To do something. intransitive
"If you don’t act soon, you will be in trouble."
- 2 behave in a certain manner; show a certain behavior; conduct or comport oneself wordnet
- 3 To do (something); to perform. obsolete, transitive
"that we act our temporal affairs with a deſire no greater than our neceſſity"
- 4 pretend to have certain qualities or state of mind wordnet
- 5 To perform a theatrical role. intransitive
"I started acting at the age of eleven in my local theatre."
Show 18 more definitions
- 6 discharge one's duties wordnet
- 7 Of a play: to be acted out (well or badly). intransitive
"But whatever types he assumes, the need to have a good play which acts delightfully well before the audience, and to their delectation, is the dominant thrust. If the play acts well, the director gets the credits."
- 8 play a role or part wordnet
- 9 To behave in a certain manner for an indefinite length of time. intransitive
"A dog which acts aggressively is likely to bite."
- 10 perform on a stage or theater wordnet
- 11 To convey an appearance of being. copulative
"He acted unconcerned so the others wouldn’t worry."
- 12 behave unnaturally or affectedly wordnet
- 13 To do something that causes a change binding on the doer. intransitive
"act on behalf of John"
- 14 perform an action, or work out or perform (an action) wordnet
- 15 To have an effect (on). intransitive
"High-pressure oxygen acts on the central nervous system and may cause convulsions or death."
- 16 have an effect or outcome; often the one desired or expected wordnet
- 17 To play (a role). transitive
"He’s been acting Shakespearean leads since he was twelve."
- 18 be suitable for theatrical performance wordnet
- 19 To feign. transitive
"He acted the angry parent, but was secretly amused."
- 20 To carry out work as a legal representative in relation to a particular legal matter. intransitive
"A lawyer cannot act until they have been formally instructed by their client."
- 21 To possess an action onto (some other structure). Examples include the group action of a group on a set, the action of a ring on a module by scalar multiplication, and the action of a group or algebra on a vector space via a representation. intransitive
"This group acts on the circle, so it can't be left-orderable!"
- 22 To move to action; to actuate; to animate. obsolete, transitive
"Self-love, the spring of motion, acts the soul."
- 23 To enact; to decree. Scotland, obsolete, transitive
Adverb
- 1 Clipping of actually. Internet, abbreviation, alt-of, clipping
"james did u act enjoy that juice? looked like u were gagging icl"
Proper Noun
- 1 Initialism of the Australian Capital Territory: a federal territory of Australia. abbreviation, alt-of, initialism
"Osteoporosis Australia is calling for the 'no hat, no play' policy in school playgrounds to be reassessed in the ACT and Tasmania, because children are not getting enough sunlight."
- 2 Initialism of American College Test. abbreviation, alt-of, initialism
- 3 Initialism of Association of Consumers and Taxpayers, a political party of New Zealand. abbreviation, alt-of, initialism
- 4 Initialism of Association of Consumers and Taxpayers, a political party of New Zealand.; ACT New Zealand, a liberal conservative political party in New Zealand. New-Zealand
Synonyms
All synonymsAntonyms
Example
"You must act in accordance with the rules."
Common questions
What is a synonym for "act"?
Common synonyms include: action, deed, enactment, accomplish, accomplished fact, accomplishment.
How do you use "act" in a sentence?
You must act in accordance with the rules.
How do you pronounce "act"?
Pronounced /ækt/.
Etymology
Etymology 1
From Middle English acte, from Old French acte, from Latin ācta (“register of events”), plural of āctum (“decree, law”), from agere (“to do, to act”), ultimately from Proto-Indo-European *h₂éǵeti. Compare German Akte (“file”). Partially displaced deed, from Old English dǣd (“act, deed”).
Etymology 2
Clipping of actually.