predicate (n.)

mid-15c., a term in logic, "that which is said of a subject," from Old French predicat and directly from Medieval Latin predicatum, from Latin praedicatum "that which is said of the subject," noun use of neuter past participle of praedicare "assert, proclaim, declare publicly," from prae- "forth, before" (see pre-) + dicare "proclaim" (from PIE root *deik- "to show," also "pronounce solemnly," and see diction).

The grammatical sense of "the word or words which express what is said of a subject in a proposition" is from 1630s. Related: Predicative; predicator; predicatory.

predicate (adj.)

"belonging to a predicate; constituting a part of what is asserted of anything," 1887, from Latin praedicatus, past participle of praedicare "proclaim, announce" (see predicate (n.)).

predicate (v.)

"declare, assert, affirm," especially as an attribute or quality of something, 1550s, a back formation from predication, or else from Latin praedicatus, past participle of praedicare "proclaim, announce" (see predicate (n.)). Related: Predicated; predicating. Phrase predicated on "founded on, based on," is American English, recorded from 1766.

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Definitions of predicate from WordNet
predicate (v.)
make the (grammatical) predicate in a proposition;
The predicate `dog' is predicated of the subject `Fido' in the sentence `Fido is a dog'
predicate (v.)
affirm or declare as an attribute or quality of;
The speech predicated the fitness of the candidate to be President
Synonyms: proclaim
predicate (v.)
involve as a necessary condition of consequence; as in logic;
solving the problem is predicated on understanding it well
Synonyms: connote
predicate (n.)
(logic) what is predicated of the subject of a proposition; the second term in a proposition is predicated of the first term by means of the copula;
`Socrates is a man' predicates manhood of Socrates
predicate (n.)
one of the two main constituents of a sentence; the predicate contains the verb and its complements;
Synonyms: verb phrase