OP

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See also: Appendix:Variations of "op"

English

Etymology 1

Abbreviation

Noun

OP (countable and uncountable, plural OPs)

  1. Initialism of Overall Position.
  2. (theater) Initialism of opposite prompt; stage right.
  3. (Internet) Initialism of original poster; the person who started a thread.
    I don't think your response really answers the OP's question.
    • 2025 April 28, Karissa Bell, “Researchers secretly experimented on Reddit users with AI-generated comments”, in Engadget‎:
      “In addition to the post’s content, LLMs were provided with personal attributes of the OP (gender, age, ethnicity, location, and political orientation), as inferred from their posting history using another LLM,” they write.
  4. (Internet) Initialism of original post.
  5. (military, law enforcement) Initialism of observation post.
  6. (organic chemistry) Abbreviation of organophosphate.
  7. (slang) Initialism of other person's; a cigarette cadged from someone.
  8. Abbreviation of outpatient.
    Antonym: IP
  9. (music industry) Abbreviation of original publishing.
    Coordinate term: SP
Translations

Proper noun

OP

  1. (Philippines, some other countries, politics) Initialism of Office of the President.

Adjective

OP (not comparable)

  1. (publishing) Abbreviation of out of print.
  2. Abbreviation of overproof.
  3. (gaming) Abbreviation of overpowered.
    • 2012 August 29, “Re: 5.0.4 first blush”, in alt.games.warcraft‎ (Usenet), message-ID <[email protected]>:
      I know they are going to tweak stuff in the next few weeks with patches as they find one class is OP and another is sucking...
  4. (Internet, music) Initialism of overplayed.
Synonyms
  • (out of print): OOP
Antonyms

Proper noun

OP

  1. (religious) Initialism of Ordo Praedicatorum (Order of Preachers, the Dominicans, a religious order).

Etymology 2

From Japanese OP (OP) (オープニング), from English opening.

Noun

OP (usually uncountable, plural OPs)

  1. Initialism of opening credits.
  2. Initialism of opening theme.
Antonyms
  • (antonym(s) of “opening credits”): ED
  • (antonym(s) of “opening theme”): ED

References

Further reading

Anagrams

Chinese

Etymology 1

From Japanese OP (OP) (オープニング), from English opening.

Pronunciation

Noun

OP

  1. (chiefly ACG) opening theme, intro sequence
Coordinate terms
  • ED (yìdì)

Etymology 2

Initialism of English Ocean Park.

Pronunciation

Proper noun

OP

  1. (Hong Kong) Ocean Park Hong Kong

German

Etymology

  • (medical senses) From the first two syllables of Operation, earlier also spelt Ope.

Pronunciation

  • IPA(key): /oˈpeː/
  • Audio:(file)

Noun

OP f (genitive OP, plural OPs)

  1. (surgery) initialism of Operation

Declension

Declension of OP
singular plural
indef. def. noun def. noun
nominative eine die OP die OPs
genitive einer der OP der OPs
dative einer der OP den OPs
accusative eine die OP die OPs

Descendants

  • → Japanese: オペ

Noun

OP m (strong, genitive OP or OPs, plural OP or OPs)

  1. (surgery) initialism of Operationssaal
  2. (electronics) initialism of Operationsverstärker

Declension

Declension of OP
singular plural
indef. def. noun def. noun
nominative ein der OP die OP, OPs
genitive eines des OP, OPs der OP, OPs
dative einem dem OP den OP, OPs
accusative einen den OP die OP, OPs

Noun

OP n (strong, genitive OP or OPs, plural OP or OPs)

  1. (EU politics) initialism of operationelles Programm

Declension

Declension of OP
singular plural
indef. def. noun def. noun
nominative ein das OP die OP, OPs
genitive eines des OP, OPs der OP, OPs
dative einem dem OP den OP, OPs
accusative ein das OP die OP, OPs

Further reading

  • “OP” in Digitales Wörterbuch der deutschen Sprache
  • “OP” in Uni Leipzig: Wortschatz-Lexikon

Japanese

Etymology 1

From オープニング (ōpuningu), from English opening.

Noun

OP(オープニング) • (ōpuningu) 

  1. (entertainment) opening theme, intro sequence; abbreviation of オープニング
Coordinate terms
Descendants
  • English: OP
  • Chinese: OP

Etymology 2

Pronunciation

Noun

OP(オープン) • (ōpun) 

  1. (sports) abbreviation of オープン (ōpun, “open (sports event that anybody can compete)”)
    全(ぜん)米(べい)OP(オープン) ― Zenbei Ōpun ― U.S. Open
    全(ぜん)豪(ごう)OP(オープン) ― Zengō Ōpun ― Australian Open
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