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

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.

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.

Definition of pro noun from the Oxford Advanced Learner's Dictionary. a person who works as a professional, especially in a sport. He handled the situation like an old pro (= somebody who has a …

Synonyms for PRO: professional, expert, skilled, proficient, technical, skillful, specialist, specialized; Antonyms of PRO: nonprofessional, lay, general, unprofessional, inexpert, ordinary, nontechnical, …

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Nov 21, 2025 · Noun [edit] pro (plural pros) (slang, historical) A chemical prophylaxis taken after sex to avoid contracting venereal disease.

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pro- comes from Greek, and has the meaning "before, beforehand, in front of'': proboscis; prophylactic; prothesis. pro- is also attached to a word and means "primitive or early form'': prodrug; prosimian.