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Definitions of certain
  1. adjective
    having or feeling no doubt or uncertainty; confident and assured
    "felt certain of success" "was sure (or certain) she had seen it"
    Opposite:
  2. adjective
    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" "he faced certain death"
    Opposite:
  3. adjective
    exercising or taking care great enough to bring assurance
    "be certain to disconnect the iron when you are through"

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  4. adjective
    reliable in operation or effect
    "a quick and certain remedy"

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  5. adjective
    established irrevocably

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  6. adjective
    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"

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  7. adjective
    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"
    Opposite:
Explanation of certain
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