Valid

Adjective

  • Related to the current topic, or presented within context, relevant.
  • Acceptable, proper or correct.

    "Do not drive without a valid license."

  • (logic) Of an argument: whose conclusion is always true whenever its premises are true.

    "An argument is valid if and only if the set consisting of both (1) all of its premises and (2) the contradictory of its conclusion is inconsistent."

  • Acceptable, proper or correct.

    "A valid format for the date is MM/DD/YY."

  • (logic) Of a formula or system: such that it evaluates to true regardless of the input values.
  • Well grounded or justifiable, pertinent.

    "I will believe him as soon as he offers a valid answer."

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