Pro-

Part of speech: noun (n.)

A prefix signifying before, in front, forth, for, in behalf of, in place of, according to; as, propose, to place before; proceed, to go before or forward; project, to throw forward; prologue, part spoken before (the main piece); propel, prognathous; provide, to look out for; pronoun, a word instead of a noun; proconsul, a person acting in place of a consul; proportion, arrangement according to parts.

Part of speech: adverb (adv.)

For, on, or in behalf of, the affirmative side; -- in contrast with Ant: con. Pro and con, for and against, on the affirmative and on the negative side; as, they debated the question pro and con; -- formerly used also as a verb. -- Pros and cons, the arguments or reasons on either side.

Part of speech: preposition (prep.)

A Latin preposition signifying for, before, forth. Pro confesso Etym: [L.] (Law), taken as confessed. The action of a court of equity on that portion of the pleading in a particular case which the pleading on the other side does not deny. -- Pro rata. Etym: [L. See Prorate.] In proportion; proportion. -- Pro re nata Etym: [L.] (Law), for the existing occasion; as matters are.