Dictionary.com
Thesaurus.com
Synonyms

pro

1 American  
[proh] / proʊ /

adverb

  1. in favor of a proposition, opinion, etc.


noun

plural

pros
  1. a proponent of an issue; a person who upholds the affirmative in a debate.

  2. an argument, consideration, vote, etc., for something.

pro- 2 American  
  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.

  2. 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.


pro 3 American  
[proh] / proʊ /

adjective

  1. professional.


noun

plural

pros
  1. a professional.

  2. the pros, the professional athletic leagues, as of football, baseball, or basketball.

    He's sure to be signed by the pros.

pro- 4 American  
  1. a prefix identical in meaning with pro-1 , occurring in words borrowed from Greek (prodrome ) or formed of Greek (and occasionally Latin) elements.


pro 5 American  
[proh] / proʊ /

noun

Slang.

plural

pros
  1. prophylactic.


pro 6 American  
[proh] / proʊ /

preposition

Latin.
  1. for.


Pro 7 American  

abbreviation

Biochemistry.
  1. proline.


PRO 8 American  
Or P.R.O.
  1. public relations officer.


pro 1 British  
/ prəʊ /

adverb

  1. in favour of a motion, issue, course of action, etc Compare anti

"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

preposition

  1. in favour of

"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

noun

  1. (usually plural) an argument or vote in favour of a proposal or motion See also pros and cons

  2. (usually plural) a person who votes in favour of a proposal, motion, 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
pro 2 British  
/ prəʊ /

noun

  1. informal short for professional

  2. slang a prostitute

"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

abbreviation

  1. professional practitioner

"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

adjective

  1. informal short for professional

"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
PRO 3 British  

abbreviation

  1. Public Records Office

  2. public relations officer

"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

pro- 4 British  

prefix

  1. in favour of; supporting

    pro-Chinese

  2. acting as a substitute for

    proconsul

    pronoun

"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

pro- 5 British  

prefix

  1. before in time or position; anterior; forward

    prophase

    procephalic

    prognathous

"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

Etymology

Origin of pro1

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

Origin of pro-2

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

Origin of pro3

First recorded in 1840–50; by shortening

Origin of pro-4

< Greek, combining form of pró for, before; pro 1

Origin of pro5

First recorded in 1945–50; by shortening

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

“The pro forma market cap, inventory, balance sheet, reinvestment rate, trading multiple, and a host of other metrics all are among the best in the peer group,” he wrote.

From Barron's

That’s more than you needed, but it gives you a fuller picture about the pros/cons of the life — and future — that you are planning.

From MarketWatch

For some, the fact that some college players are being paid like professionals suggests that students should face consequences like pros, too.

From MarketWatch

Mira Costa players have the advantage of walking around or going to the store and running into a Dodger or pro player in Manhattan Beach.

From Los Angeles Times

And some pros are wary of markets that exhibit unprecedented trading patterns.

From The Wall Street Journal