PRO definition: 1. an advantage to or a reason for doing something: 2. a person who plays a sport as a job rather…. Learn more.

The meaning of PRO is an argument or evidence in affirmation. How to use pro in a sentence.

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PRO definition: in favor of a proposition, opinion, etc. See examples of pro used in a sentence.

1. a prefix, having anti- as its opposite, used to form adjectives that have the general sense “favoring” the group, interests, course of action, etc., denoted by the headword: pro-choice; pro-American; prowar.

If noxious vapours come over, it is necessary to have an air-tight connexion between the condenser and receiver, and to pro vide the latter with an outlet tube leading to an absorption column or other …

Jan 15, 2026 · Noun [edit] pro (plural pros) (slang, historical) A chemical prophylaxis taken after sex to avoid contracting venereal disease.

In some words, as proconsul, proprætor, pronoun, etc., it is properly the preposition (Latin pro, for, instead of). from the GNU version of the Collaborative International Dictionary of English.

"forward, forth, toward the front" (as in proclaim, proceed); "beforehand, in advance"… See origin and meaning of pro-.

He is a pro when it comes to household repairs. She handled that tricky situation like an old pro. He is playing in the pros now.