pro

1 of 7

noun

plural pros
1
: an argument or evidence in affirmation
an appraisal of the pros and cons
2
: the affirmative side or one holding it

pro

2 of 7

adverb

: on the affirmative side : in affirmation
much has been written pro and con

pro

3 of 7

preposition

: in favor of : for

pro

4 of 7

noun or adjective

PRO

5 of 7

abbreviation

public relations officer

pro-

6 of 7

prefix (1)

1
a
: earlier than : prior to : before
prothalamion
b
: rudimentary : prot-
pronucleus
c
: precursory
proinsulin
2
a
: located in front of or at the front of : anterior to
procephalic
b
: front : anterior
prothorax
3
: projecting
prognathous

pro-

7 of 7

prefix (2)

1
: taking the place of : substituting for
procathedral
procaine
2
: favoring : supporting : championing
pro-American

Examples of pro in a Sentence

Noun He is a pro when it comes to household repairs. She handled that tricky situation like an old pro.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Noun
And the Winners of the 2025 Stunt Awards Are … Hundreds of action pros voted, and George Miller’s postapocalyptic action team reigned supreme. Britina Cheng, Vulture, 27 Feb. 2025 Leaning into its loyalty program for pros and DIY with more offers. Catherine Muccigrosso, Charlotte Observer, 26 Feb. 2025
Adverb
In a 2021 interview with PEOPLE, the tennis pro shared how having a family has shifted her priorities. Gabrielle Rockson, People.com, 18 Feb. 2025 The nail pro used OPI shades as well as hues from the OPI Mexico City collection to achieve her gold chrome French tips and pastel blue base adorned with jewel accents. Michelle Lee, People.com, 3 Feb. 2025
Preposition
The backstory: Since bringing in longtime pro Wayne Ferreira as coach and taking his game more seriously, Tiafoe has really transformed his career over the last couple years. Dan Wolken, USA TODAY, 19 Jan. 2023 That matched the second-highest finish by a Sun Devil, the other coming from current PGA pro Jon Rahm in 2016. Michelle Gardner, The Arizona Republic, 27 May 2021
Noun or adjective
The young pro took home his second PGA Tour title with a consistent performance throughout all four rounds. Dan Perry, Newsweek, 20 Feb. 2025 As the golf pro’s teammates, Kevin Kisner and Tom Kim, fell over laughing, Woods walked over in confusion. Sam Gillette, People.com, 19 Feb. 2025 See All Example Sentences for pro

Word History

Etymology

Noun

Middle English, from Latin, preposition, for — more at for

Adverb

pro-

Preposition

Latin

Prefix (1)

New Latin, from Latin, from Greek, before, forward, forth, for, from pro — more at for

Prefix (2)

Latin pro in front of, before, for, forward — more at for

First Known Use

Noun

15th century, in the meaning defined at sense 1

Adverb

15th century, in the meaning defined above

Preposition

1817, in the meaning defined above

Noun Or Adjective

1856, in the meaning defined above

Time Traveler
The first known use of pro was in the 15th century

Browse Nearby Words

Cite this Entry

“Pro.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pro. Accessed 6 Mar. 2025.

Kids Definition

pro

1 of 5 noun
plural pros
ˈprōz
: an argument or evidence in favor of something
discuss the pros and cons

pro

2 of 5 adverb
: in favor of something

pro

3 of 5 noun or adjective

pro-

4 of 5 prefix
: located in front of or at the front of
prothorax

pro-

5 of 5 prefix
1
: taking the place of : substituting for
pronoun
2
: favoring : supporting
pro-American
Etymology

Noun

Middle English pro "an argument in favor of something," from Latin pro (preposition) "in favor of, for"

Noun or adjective

a shortened form of professional

Prefix

derived from Greek pro "before, forward"

Prefix

derived from Latin pro "in front of, for"

Medical Definition

Pro

1 of 2 abbreviation
proline; prolyl

PRO

2 of 2 abbreviation
peer review organization

More from Merriam-Webster on pro

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!