certain | Definition of certain

1 known but not named

a certain person told me that today is your birthday

Synonyms of certain

anonymous, given, one, some, unidentified, unnamed, unspecified

Words Related to certain

particular, specific

Near Antonyms of certain

known, named, specified

2 having or showing a mind free from doubt

I'm certain that they'll arrive on time

Synonyms of certain

assured, clear, cocksure, confident, doubtless, implicit, positive, sanguine, sure

Words Related to certain

self-assured, self-conceited, self-confident

decisive, resolute, unfaltering, unhesitating, unquestioning, unwavering

Near Antonyms of certain

hesitant, indecisive, vacillating, wavering

diffident, unassuming

Antonyms of certain

doubtful, dubious, uncertain, unsure

3 having been established and usually not subject to change

a certain percentage of the profits will go to charity

Synonyms of certain

determinate, final, firm, fixed, flat, frozen, hard, hard-and-fast, inexpugnable, set, settled, stable

Words Related to certain

nonadjustable, noncancelable, nonnegotiable, unchangeable

constant, steady, unchanging, uniform, unwavering

definite, exact, explicit, specific

given, stated, stipulated

dependable, good, reliable, responsible, safe, solid, sure, tried, tried-and-true, true, trustworthy, trusty

Near Antonyms of certain

adjustable, changeable, negotiable

indefinite, open-ended, unspecified

capricious, changeful, flickery, fluctuating, fluid, inconstant, mercurial, mutable, temperamental, uncertain, unpredictable, unsettled, unstable, unsteady, variable, volatile

4 impossible to avoid or evade

as he got older, the athlete began to feel the certain effects of the aging process on his body

Synonyms of certain

ineluctable, ineludible, inescapable, inevitable, necessary, sure, unavoidable, unescapable

Words Related to certain

decided, definite, settled

likely, possible, probable

destined, fated, foreordained, predestined, predetermined, preordained

inexorable, relentless, unremitting, unstoppable

Phrases Synonymous with certain

in the bag, in the cards (also on the cards)

Near Antonyms of certain

preventable (also preventible)

doubtful, dubious, questionable, shaky, unclear

undecided, unsettled

undependable, unreliable

improbable, unlikely

Antonyms of certain

avoidable, evadable, uncertain, unsure

5 not likely to fail

chicken soup is grandma's certain cure for pretty much whatever ails you

Synonyms of certain

can't-miss, fail-safe, infallible, sure

Synonyms and Antonyms of certain

WORD OF THE DAY

restive