certain
1. [ adjective ] definite but not specified or identified
Examples:

"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"

Related terms: definite
2. [ adjective ] having or feeling no doubt or uncertainty; confident and assured
Synonyms: sure
Examples:

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

Related terms: uncertain uncertain convinced assurance certainty
3. [ adjective ] established beyond doubt or question; definitely known
Examples:

"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"

Related terms: uncertain definite indisputable sure_as_shooting certainty
4. [ adjective ] certain to occur; destined or inevitable
Synonyms: sure
Examples:

"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"

Related terms: uncertain in_for bound doomed foreordained predictable
5. [ noun ] Last name, frequency rank in the U.S. is 20995
6. [ adjective ] established irrevocably
Synonyms: sealed
Examples:

"his fate is sealed"

Related terms: unsealed
7. [ adjective ] capable of being depended on
Synonyms: sure
Examples:

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

Related terms: reliable
8. [ adjective ] exercising or taking care great enough to bring assurance
Synonyms: sure
Examples:

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

Related terms: careful
Similar spelling:   certainty
  certainly
  curtain
  curtained
  ceratin