Definitions

unnecessary

[uhn-nes-uh-ser-ee] / ʌnˈnɛs əˌsɛr i /

ADJECTIVE

not required

Synonyms

STRONGEST

avoidable futile gratuitous irrelevant needless redundant superfluous unneeded useless worthless

WEAK

accidental additional beside the point casual causeless chance dispensable excess exorbitant expendable extraneous extrinsic fortuitous haphazard inessential lavish noncompulsory nonessential optional prodigal profuse random supererogatory surplus uncalled-for uncritical undesirable unessential unrequired wanton

Antonyms

STRONGEST

necessary needed valuable worthwhile

WEAK

indispensable required

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Insurers have long said that their preapproval requirements aim to ensure that patients don’t get unnecessary or harmful care.

From The Wall Street Journal • Jun. 11, 2026

The advisers are paid by their employer, so it’s technically not free advice, and you should be careful that they don’t sell you unnecessary insurance or annuities.

From MarketWatch • Jun. 11, 2026

He said the department's workload action plan set out "a clear programme of reform to reduce unnecessary workload and build a more manageable and sustainable workload culture".

From BBC • Jun. 2, 2026

Warsh’s first months as chair will test whether the Fed can maintain inflation credibility while avoiding unnecessary damage to an already pressured consumer economy.

From Salon • Jun. 1, 2026

Ophie registered the change in Richard’s demeanor immediately, and she bobbed a curtsy even though Richard had said it was unnecessary.

From "Ophie's Ghosts" by Justina Ireland

Vocabulary lists containing unnecessary

List 3

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List 9

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"New Michigan Graduation Requirements Shortchange Many Students"

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