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op

1 American  
[op] / ɒp /

noun

  1. op art.

OP 2 American  
Or O.P.

  1. observation post.

op- 3 American  

  1. variant of ob- (by assimilation) before p:

    oppose.
op. 4 American  

abbreviation

  1. opera.

  2. operation.

  3. opposite.

  4. opus.

Op. 5 American  

abbreviation

  1. opus.

o.p. 6 American  

abbreviation

  1. out of print.

O.P. 7 American  

abbreviation

  1. Order of Preachers (Dominican).

O.P. 8 American  

abbreviation

  1. observation post.

  2. British Theater. opposite prompt.

  3. out of print.

  4. overproof.

op. 1 British  

abbreviation

  1. operation

  2. opus

  3. operator

  4. operational

"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
OP 2 British  

abbreviation

  1. military observation post

  2. Ordo Praedicatorum (the Dominicans)

  3. organophosphate

"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
o.p. 3 British  

abbreviation

  1. out of print

"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

Usage

What else does OP mean? On internet forums and message boards, OP is short for original poster, or the person who started the thread that users comment on. In video gaming, anime, and sports, OP is a shorthand for overpowered, describing an indomitable character or player. Contet warning: This article features information about a homophobic slur that is highly offensive. How do you pronounce OP?[ oh-pee ]

Etymology

Origin of O.P.

From Latin Ōrdō Praedicātōrum

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.

Cernovich was one of many online influencers who took part in a photo op at the Oval Office in February 2025, walking away with a binder labelled "The Epstein Files: Phase One".

From BBC • Apr. 11, 2026

Ku said Trump would be eager to display his diplomatic prowess by securing a rare photo op with Kim.

From Barron's • Feb. 12, 2026

“It’s an op dude—I do this for a living—the pieces that are dropping are deeply researched. This is sophisticated op.”

From The Wall Street Journal • Feb. 6, 2026

She just spoke on how they came onto the boat, they threw food at her and took pictures for the photo op.

From Slate • Sep. 29, 2025

For the good of the People in general, it was better he remain outside the op zone.

From "Artemis Fowl" by Eoin Colfer

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.