noun

• (grammar) The part of the sentence (or clause) which states a property that a subject has or is characterized by.
  "In the light of this observation, consider Number Agreement in a sentence like: (120) They seem to me [_S — to be fools/^✽a fool] Here, the Predicate Nominal fools agrees with the italicised NP they, in spite of the fact that (as we argued earlier) the two are contained in different Clauses at S-structure. How can this be? Under the NP MOVEMENT analysis of seem structures, sentences like (120) pose no problem; if we suppose that they originates in the — position as the subordinate Clause Subject, then we can say that the Predicate Nominal agrees with the underlying Subject of its Clause. How does they get from its underlying position as subordinate Clause Subject to its superficial position as main Clause Subject? By NP MOVEMENT, of course!"
• (logic) A term of a statement, where the statement may be true or false depending on whether the thing referred to by the values of the statement's variables has the property signified by that (predicative) term.
  "A propositional variable may be treated as a nullary predicate."
• (computing) An operator or function that returns either true or false.

adj

• (grammar) Of or related to the predicate of a sentence or clause.
• (law) Relating to or being any of a series of criminal acts upon which prosecution for racketeering may be predicated.

verb

• (transitive) To announce, assert, or proclaim publicly.
• (transitive) To assume or suppose; to infer.
  "There was a character about Madame Defarge, from which one might have predicated that she did not often make mistakes against herself in any of the reckonings over which she presided."
• (transitive, originally US) to base (on); to assert on the grounds of.
  "The law is what constitutes both desire and the lack on which it is predicated."
• (transitive, grammar) To make a term (or expression) the predicate of a statement.