What does "injection" mean?
The act of injecting, or something that is injected.
Injection
/ɪnˈd͡ʒɛk.ʃən/ noun
noun ·Common ·High school level
Meaning at a glance
- Primary sense: The act of injecting, or something that is injected.
- Grammar: injection is listed as noun.
- Nearest alternatives: shot, antitoxin, apogee, aside.
- Useful contrasts: atomizer, extraction, extruding.
- Usage evidence: He had an injection prior to the operation.
How to use "injection"
- Start with the primary definition, then check the part of speech before placing the word in a sentence.
- Compare nearby synonyms to make sure "injection" 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 "injection" 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 "injection" as the right word for your sentence.
If your draft is formal, technical, persuasive, or sensitive, compare "injection" 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 "injection" is acting as noun 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 "shot" 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 "injection", 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 The act of injecting, or something that is injected. countable, uncountable
"For some indications in PET imaging, it is necessary for radiopharmaceutical injections to be administered contralaterally or pedally to the disease process"
- 2 the forceful insertion of a substance under pressure wordnet
- 3 A specimen prepared by injection. countable, uncountable
- 4 the act of putting a liquid into the body by means of a syringe wordnet
- 5 A morphism from either one of the two components of a coproduct to that coproduct. countable, uncountable
Show 12 more definitions
- 6 any solution that is injected (as into the skin) wordnet
- 7 The act of inserting materials like concrete grout or gravel by using high pressure pumps. countable, uncountable
- 8 The supply of additional funding to a person or a business. countable, figuratively, uncountable
"The troubled business received a much-needed cash injection."
- 9 A relation on sets (X,Y) that associates each element of Y with at most one element of X. countable, uncountable
- 10 The insertion of program code into an application, URL, hardware, etc.; especially when malicious or when the target is not designed for such insertion. countable, uncountable
"a SQL injection exploit allowing a malicious user to modify a database query"
- 11 The act of putting a spacecraft into a particular orbit, especially for changing a stable orbit into a transfer orbit, e.g. trans-lunar injection. countable, uncountable
"It had been determined that one of the whip turnstile antennas had broken off from Explorer 1 shortly after injection into orbit, so these were eliminated."
- 12 A function that maps distinct x in the domain to distinct y in the codomain; formally, a f: X → Y such that f(a) = f(b) implies a = b for any a, b in the domain. countable, uncountable
- 13 Something injected subcutaneously, intravenously, or intramuscularly by use of a syringe and a needle. countable, uncountable
- 14 Congestion (of a body part, with blood or other fluid), such as hyperemia. countable, uncountable
"conjunctival injection"
- 15 Fuel injection: the pressurized introduction of fuel into a cylinder. countable, uncountable
"direct injection"
- 16 The act of throwing cold water into a condenser to produce a vacuum. countable, uncountable
- 17 The cold water thrown into a condenser to produce a vacuum. countable, uncountable
Antonyms
Example
"He had an injection prior to the operation."
Common questions
What is a synonym for "injection"?
Common synonyms include: shot, antitoxin, apogee, aside, attitude-control rocket, bag.
How do you use "injection" in a sentence?
He had an injection prior to the operation.
How do you pronounce "injection"?
Pronounced /ɪnˈd͡ʒɛk.ʃən/.
Etymology
Borrowed from Middle French injection, from Latin iniectio. The mathematical sense is from French injection, introduced by Nicolas Bourbaki in their treatise Éléments de mathématique. Equivalent to inject + -ion.