Vaccine

/vækˈsin/ adj, noun, verb

adj, noun, verb ·Moderate ·College level

Meaning at a glance

  • Primary sense: A substance given to stimulate a body's production of antibodies and provide immunity against a disease without causing the disease itself in the treatment, prepared from the agent that causes the disease (or a derivative of it; or a related, also effective, but safer disease), or a synthetic substitute; also, a dose of such a substance.
  • Grammar: vaccine is listed as adj, noun, verb.
  • Nearest alternatives: a, antitoxin, autogenous vaccine, b.
  • Useful contrasts: immunization lapse, ineffective control, no vaccine.
  • Usage evidence: Scientists haven't found a vaccine for cancer yet.

How to use "vaccine"

  1. Start with the primary definition, then check the part of speech before placing the word in a sentence.
  2. Compare nearby synonyms to make sure "vaccine" carries the exact meaning, tone, and strength you need.
  3. 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 "vaccine" 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 "vaccine" as the right word for your sentence.

If your draft is formal, technical, persuasive, or sensitive, compare "vaccine" 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 "vaccine" is acting as adj, 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 "a" 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 "vaccine", 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. 1
    A substance given to stimulate a body's production of antibodies and provide immunity against a disease without causing the disease itself in the treatment, prepared from the agent that causes the disease (or a derivative of it; or a related, also effective, but safer disease), or a synthetic substitute; also, a dose of such a substance. countable, uncountable

    "I am much inclined to the vaccine. My friend, Mr. L—, has had all his children vaccined, and I just wait to see the effect."

  2. 2
    immunogen consisting of a suspension of weakened or dead pathogenic cells injected in order to stimulate the production of antibodies wordnet
  3. 3
    The process of vaccination; immunization, inoculation. countable, uncountable

    "My dog has had two vaccines this year."

  4. 4
    The material taken from cowpox pustules used for vaccination against smallpox. countable, historical, uncountable
  5. 5
    The disease cowpox, especially as a source of material for vaccination against smallpox. also, countable, obsolete, uncountable
Show 2 more definitions
  1. 6
    Something defensive or protective in nature, like a vaccine (sense 1.1). countable, figuratively, uncountable
  2. 7
    A software program which protects computers against, or detects and neutralizes, computer viruses and other types of malware; an antivirus. countable, figuratively, uncountable
Verb
  1. 1
    Synonym of vaccinate (“to treat (a person or an animal) with a vaccine to produce immunity against a disease”). archaic, transitive

    "[S]ince you have decided that the boy shall be vaccined, let us send directly for the surgeon and have it done, and then he will be safe."

Adjective
  1. 1
    Of, pertaining to, caused by, or characteristic of cowpox. historical, not-comparable
  2. 2
    Of or pertaining to cowpox as a source of material for vaccination against smallpox; also, of or pertaining to such material used for vaccination. historical, not-comparable

    "I will call upon them: they are healthy children, we can have the vaccine infection from them, and I will inoculate the boy myself."

  3. 3
    Of, pertaining to, or derived from cattle. archaic, not-comparable

    "[M]y play could not have been written but for the work done by Sir Almroth Wright in the theory and practice of securing immunization from bacterial diseases by the inoculation of "vaccines" made of their own bacteria: a practice incorrectly called vaccinetherapy (there is nothing vaccine about it) apparently because it is what vaccination ought to be and is not."

Synonyms

All synonyms
aantitoxinautogenous vaccinebbangbooster

Antonyms

immunization lapseineffective controlno vaccinenonimmunization

Example

"Scientists haven't found a vaccine for cancer yet."

Common questions

What does "vaccine" mean?

A substance given to stimulate a body's production of antibodies and provide immunity against a disease without causing the disease itself in the treatment, prepared from the agent that causes the disease (or a derivative of it; or a related, also effective, but safer disease), or a synthetic substitute; also, a dose of such a substance.

What is a synonym for "vaccine"?

Common synonyms include: a, antitoxin, autogenous vaccine, b, bang, booster.

How do you use "vaccine" in a sentence?

Scientists haven't found a vaccine for cancer yet.

How do you pronounce "vaccine"?

Pronounced /vækˈsin/.

Etymology

Etymology 1

Learned borrowing from Latin vaccīnus (“of or derived from a cow”), from vacca (“cow (female cattle)”) + -īnus (suffix meaning ‘of or pertaining to’ forming adjectives). Sense 1 refers to the early use of the cowpox virus as a vaccination against smallpox: see New Latin variolae vaccīnae (“cowpox”, plural, literally “infectious diseases of cattle causing pustules”), coined by the British physician and scientist Edward Jenner (1749–1823).

Etymology 2

The noun is probably partly: * derived from vaccine (adjective) (see etymology 1); and * borrowed from French vaccine (“cowpox (short for variole vaccine); vaccination against smallpox using material from cowpox”), vaccin (“cowpox material used for smallpox vaccination”), both noun uses of vaccin (adjective), from Latin vaccīnus (see etymology 1). The verb is derived from the noun. Cognates * Italian vaccina * Portuguese vacina * Spanish vacuna

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