proproʊ(adv.; n.)(pl.)pros.

1. (adv.)in favor of a proposition, opinion, etc.

2. (n.)the argument, position, arguer, or voter for something.

   Ref: Compare con1. 1 1

Origin of pro:

1350–1400; ME < L prō (prep.) in favor of, for ; akin to per -, Gk pró, Skt pra

proproʊ(adj.; n.)(pl.)pros.

1. professional.

   Category: Informal

Origin of pro:

1840–50; by shortening

PRO

or P.R.O.

1. public relations officer.

   Category: Titles, Associations, Organizations

pro-

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.

   Category: Affix

2. a prefix occurring in loanwords from Latin, with the meanings “forward,” forming esp. verbs denoting forward movement or location (proceed; progress), advancement (promote; propose), or bringing into existence (procreate; produce); “before, outside of” (profane); “in place of” (pronoun).

   Category: Affix

Origin of pro-:

< L prō-, pro-, comb. form repr. prōpro1

pro-

1. a prefix, occurring orig. in loanwords from Greek, with the meanings “before, beforehand, in front of” (prognosis; prophylactic; prothesis), “front part, extremity” (proboscis), “primitive or embryonic form,”“precursor” (prodrug; pronephros; prosimian).

   Category: Affix

Origin of pro-:

< Gk, comb. form of pró for, before; see pro1