certain as in definite but not specified or identified

• "set aside a certain sum each week"
• "to a certain degree"
• "certain breeds do not make good pets"
• "certain members have not paid their dues"
• "a certain popular teacher"
• "a certain Mrs. Jones"

Synonyms

• certain(a)

certain as in having or feeling no doubt or uncertainty

• "confident and assured"
• "felt certain of success"
• "was sure (or certain) she had seen it"
• "was very sure in his beliefs"
• "sure of her friends"

Synonyms

• certain(p)
• suredefinitely or positively (`sure' is sometimes used informally for `surely'); having or feeling no doubt or uncertainty; exercising or taking care great enough to bring assurance; certain to occur; physically secure or dependable; reliable in operation or effect; (of persons) worthy of trust or confidence; infallible or unfailing; certain not to fail; impossible to doubt or dispute

certain as in established beyond doubt or question

• "definitely known"
• "what is certain is that every effect must have a cause"
• "it is certain that they were on the bus"
• "his fate is certain"
• "the date for the invasion is certain"

Synonyms

• certain(p)

certain as in certain to occur

• "destined or inevitable"
• "he was certain to fail"
• "his fate is certain"
• "In this life nothing is certain but death and taxes- Benjamin Franklin"
• "he faced certain death"
• "sudden but sure regret"
• "he is sure to win"

Synonyms

• suredefinitely or positively (`sure' is sometimes used informally for `surely'); having or feeling no doubt or uncertainty; exercising or taking care great enough to bring assurance; certain to occur; physically secure or dependable; reliable in operation or effect; (of persons) worthy of trust or confidence; infallible or unfailing; certain not to fail; impossible to doubt or dispute

certain as in established irrevocably

• "his fate is sealed"

Synonyms

• sealedestablished irrevocably; closed or secured with or as if with a seal; undisclosed for the time being; determined irrevocably; having been paved ; covered with a waterproof coating; (of walls) covered with a coat of plaster

certain as in reliable in operation or effect

• "a quick and certain remedy"
• "a sure way to distinguish the two"
• "wood dust is a sure sign of termites"

Synonyms

• suredefinitely or positively (`sure' is sometimes used informally for `surely'); having or feeling no doubt or uncertainty; exercising or taking care great enough to bring assurance; certain to occur; physically secure or dependable; reliable in operation or effect; (of persons) worthy of trust or confidence; infallible or unfailing; certain not to fail; impossible to doubt or dispute

certain as in exercising or taking care great enough to bring assurance

• "be certain to disconnect the iron when you are through"
• "be sure to lock the doors"

Synonyms

• suredefinitely or positively (`sure' is sometimes used informally for `surely'); having or feeling no doubt or uncertainty; exercising or taking care great enough to bring assurance; certain to occur; physically secure or dependable; reliable in operation or effect; (of persons) worthy of trust or confidence; infallible or unfailing; certain not to fail; impossible to doubt or dispute