Dictionary.com

pro

1
[ proh ]
/ proʊ /
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adverb
in favor of a proposition, opinion, etc.
noun, plural pros.
a proponent of an issue; a person who upholds the affirmative in a debate.
an argument, consideration, vote, etc., for something.
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Compare con1.

Origin of pro

1
First recorded in 1400–50; Middle English, from Latin prō (preposition) “in favor of, on behalf of,” akin to Greek pró, Sanskrit pra; see also for, per

Other definitions for pro (2 of 8)

pro2
[ proh ]
/ proʊ /
Informal.

adjective
noun, plural pros.
a professional.
the pros, the professional athletic leagues, as of football, baseball, or basketball: He's sure to be signed by the pros.

Origin of pro

2
First recorded in 1840–50; by shortening

Other definitions for pro (3 of 8)

pro3
[ proh ]
/ proʊ /

noun, plural pros.Slang.

Origin of pro

3
First recorded in 1945–50; by shortening

Other definitions for pro (4 of 8)

pro4
[ proh ]
/ proʊ /

preposition Latin.
for.

Other definitions for pro (5 of 8)

Pro

abbreviation Biochemistry.

Other definitions for pro (6 of 8)

PRO

or P.R.O.


public relations officer.

Other definitions for pro (7 of 8)

pro-1

a prefix indicating favor for some party, system, idea, etc., without identity with the group (pro-British; pro-Communist; proslavery), having anti- as its opposite.
a prefix of priority in space or time having especially a meaning of advancing or projecting forward or outward, and also used to indicate substitution, attached widely to stems not used as words: provision; prologue; proceed; produce; protract; procathedral; proconsul.

Origin of pro-

1
<Latin prō-,pro-, combining form representing prōpro1

Other definitions for pro (8 of 8)

pro-2

a prefix identical in meaning with pro-1 , occurring in words borrowed from Greek (prodrome) or formed of Greek (and occasionally Latin) elements.

Origin of pro-

2
<Greek, combining form of pró for, before; see pro1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

How to use pro in a sentence

British Dictionary definitions for pro (1 of 5)

pro1
/ (prəʊ) /

adverb
in favour of a motion, issue, course of action, etcCompare anti
preposition
in favour of
noun plural pros
(usually plural) an argument or vote in favour of a proposal or motionSee also pros and cons
(usually plural) a person who votes in favour of a proposal, motion, etc
See con 2

Word Origin for pro

from Latin prō (prep) in favour of

British Dictionary definitions for pro (2 of 5)

pro2
/ (prəʊ) /

noun plural pros
informal short for professional
slang a prostitute
the internet domain name for
professional practitioner
adjective
informal short for professional

Word Origin for pro

C19: by shortening

British Dictionary definitions for pro (3 of 5)

PRO

abbreviation for
Public Records Office
public relations officer

British Dictionary definitions for pro (4 of 5)

pro-1

prefix
in favour of; supportingpro-Chinese
acting as a substitute forproconsul; pronoun

Word Origin for pro-

from Latin prō (adv and prep). In compound words borrowed from Latin, prō- indicates: forward, out (project); forward and down (prostrate); away from a place (prodigal); onward in time or space (proceed); extension outwards (propagate); before in time or place (provide, protect); on behalf of (procure); acting as a substitute for (pronominal); and sometimes intensive force (promiscuous)

British Dictionary definitions for pro (5 of 5)

pro-2

prefix
before in time or position; anterior; forwardprophase; procephalic; prognathous

Word Origin for pro-

from Greek pro (prep) before (in time, position, rank, etc)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for pro (1 of 2)

Pro

abbr.
proline

Medical definitions for pro (2 of 2)

pro-

pref.
Earlier; before; prior to:progenitor.
Rudimentary:pronucleus.
Anterior; in front of:procephalic.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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