What does "mad" mean?
Initialism of mutual assured destruction or mutually assured destruction.
Mad
/ˈmæd/ adj, adv, name, noun, verb, slang
adj, adv, name, noun, verb, slang ·Very common ·Middle school level
Meaning at a glance
- Primary sense: Initialism of mutual assured destruction or mutually assured destruction.
- Grammar: mad is listed as adj, adv, name, noun, verb, slang.
- Nearest alternatives: insane, a transient madness, abandoned, abnormal.
- Useful contrasts: apathetic, calm, composed.
- Usage evidence: He was still mad about the accident despite his wife's conciliatory words.
How to use "mad"
- Start with the primary definition, then check the part of speech before placing the word in a sentence.
- Compare nearby synonyms to make sure "mad" 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 "mad" 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 "mad" as the right word for your sentence.
If your draft is formal, technical, persuasive, or sensitive, compare "mad" 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 "mad" is acting as adj, adv, name, noun, verb, slang 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 "insane" 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 "mad", 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 Initialism of mutual assured destruction or mutually assured destruction. abbreviation, alt-of, countable, initialism, uncountable
"[T]he only bombs anyone dropped—on Hiroshima and Nagasaki—were Uncle Sam's message to non-nuclear Japan. MAD was salvation. MAD was security. MAD was the way of life most of us grew up with, the prevailing logic of uneasy peace. So whatever became of our mad, mad world?"
- 2 Acronym of mothers against decapentaplegic. abbreviation, acronym, alt-of, uncountable
- 3 Initialism of magnetic anomaly detector. abbreviation, alt-of, countable, initialism, uncountable
- 4 Initialism of mothers against decapentaplegic. abbreviation, alt-of, countable, initialism, uncountable
- 5 Acronym of magnetically-arrested disc, a type of black hole accretion disc). abbreviation, acronym, alt-of, countable, uncountable
Show 1 more definition
- 6 Initialism of mandibular advancement device. abbreviation, alt-of, countable, initialism, uncountable
Verb
- 1 To be or become mad. intransitive, obsolete
"The imperial Elizabetta gazed with surprise at the youthful and unpretending appearance of the little being that had set the world madding."
- 2 To madden, to anger, to frustrate. Jamaica, US, colloquial
"This musick mads me, let it sound no more."
Adjective
- 1 Insane; crazy, mentally deranged. British
"You want to spend a thousand pounds on a pair of shoes? Are you mad?"
- 2 Angry, annoyed. US, informal
"Are you mad at me?"
- 3 Used litotically to indicate satisfaction or approval. informal
"Wow, you really made this pie from scratch? I'm not mad at it."
- 4 Bizarre; incredible. Ireland, UK, informal
"It's mad that I got that job back a day after being fired."
- 5 Wildly confused or excited.
"to be mad with terror, lust, or hatred"
Show 5 more definitions
- 6 Extremely foolish or unwise; irrational; imprudent.
- 7 Extremely enthusiastic about; crazy about; infatuated with; overcome with desire for. colloquial, usually
"Aren't you just mad for that red dress?"
- 8 Abnormally ferocious or furious; or, rabid, affected with rabies.
"a mad dog"
- 9 Intensifier, signifying abundance or high quality of a thing; very, much or many. New-York, slang
"I gotta give you mad props for scoring us those tickets. Their lead guitarist has mad skills. There are always mad girls at those parties."
- 10 Having impaired polarity.
Adjective
- 1 roused to anger wordnet
- 2 affected with madness or insanity wordnet
- 3 marked by uncontrolled excitement or emotion wordnet
- 4 very foolish wordnet
Adverb
- 1 Intensifier; to a large degree; extremely; exceedingly; very; unbelievably. Ireland, New-York, UK, dialectal, not-comparable, slang
"He was driving mad slow."
Proper Noun
- 1 Acronym of Michigan algorithm decoder, a programming language, a variant of ALGOL, developed in 1959 at the University of Michigan. abbreviation, acronym, alt-of
Synonyms
All synonymsExample
"He was still mad about the accident despite his wife's conciliatory words."
Common questions
What is a synonym for "mad"?
Common synonyms include: insane, a transient madness, abandoned, abnormal, absurd, accident prone.
How do you use "mad" in a sentence?
He was still mad about the accident despite his wife's conciliatory words.
How do you pronounce "mad"?
Pronounced /ˈmæd/.
Etymology
Etymology 1
From Middle English mad, madde, madd, medd, from Old English ġemǣd, ġemǣded (“enraged”), past participle of ġemǣdan, *mǣdan (“to make insane or foolish”), from Proto-Germanic *maidijaną (“to change; damage; cripple; injure; make mad”), from Proto-Germanic *maidaz ("weak; crippled"; compare Old English gemād (“silly, mad”), Old High German gimeit (“foolish, crazy”), literary German gemeit (“mad, insane”), Gothic 𐌲𐌰𐌼𐌰𐌹𐌸𐍃 (gamaiþs, “crippled”)), from Proto-Indo-European *mey- ("to change"; compare Old Irish máel (“bald, dull”), Old Lithuanian ap-maitinti (“to wound”), Sanskrit मेथति (méthati, “he hurts, comes to blows”)).
Etymology 2
From Middle English madden, from the adjective; compare Old English ġemǣdan.