OP

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.
4. (Internet) Initialism of original poster; the person who started a thread.

   Coordinate term: OOP

   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^[1]:

     “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.

5. (Internet) Initialism of original post.
6. (military, law enforcement) Initialism of observation post.
7. (organic chemistry) Abbreviation of organophosphate.
8. (slang) Initialism of other person's; a cigarette cadged from someone.
9. Abbreviation of outpatient.

   Antonym: IP

10. (music industry) Abbreviation of original publishing.

    Coordinate term: SP

Translations

(internet) original poster

• Chinese:

  Mandarin: 樓主 / 楼主 (zh) (lóuzhǔ), 原po (yuánpō), po主 (pōzhǔ)

• Finnish: AP (fi)
• German: OP (de) m, Themenersteller m
• Japanese: >>1 (ja) (ichi), スレ主 (ja) (surenushi)
• Korean: please add this translation if you can
• Lithuanian: PP m
• Russian: оп (ru) m (op)
• Swedish: TS c
• Thai: จขกท (jɔɔ-kɔ̌ɔ-gɔɔ-tɔɔ)
• Vietnamese: chủ thớt (vi)

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^[2] (Usenet), message-ID <k1l1nq$emb$1@dont-email.me>:

     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

• (antonym(s) of “overpowered”): underpowered, nerfed

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

• http://www.answers.com/topic/op

Further reading

• Office of the President of the Philippines on Wikipedia.Wikipedia

Anagrams

• P.O., PO, Po, Pô, po, po'

Chinese

Etymology 1

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

Pronunciation

• Mandarin

  (Pinyin): ōupì

  (Zhuyin): ㄡ ㄆㄧˋ

• Cantonese (Jyutping): ou¹ pi¹

---

• Mandarin
  • (Standard Chinese)⁺
    • Hanyu Pinyin: ōupì
    • Zhuyin: ㄡ ㄆㄧˋ
    • Tongyong Pinyin: oupì
    • Wade–Giles: ou¹-pʻi⁴
    • Yale: ōu-pì
    • Gwoyeu Romatzyh: oupih
    • Palladius: оупи (oupi)
    • Sinological IPA ^(key): /ˀoʊ̯⁵⁵ pʰi⁵¹/
• Cantonese
  • (Standard Cantonese, Guangzhou–Hong Kong)⁺
    • Jyutping: ou¹ pi¹
    • Yale: ōu pī
    • Cantonese Pinyin: ou¹ pi¹
    • Guangdong Romanization: ou¹ pi¹
    • Sinological IPA ^(key): /ou̯⁵⁵ pʰiː⁵⁵/

Noun

OP

1. (chiefly ACG) opening theme, intro sequence

Coordinate terms

• ED (yìdì)

Etymology 2

Initialism of English Ocean Park.

Pronunciation

• Cantonese (Jyutping): ou¹ pi¹

---

• Cantonese
  • (Standard Cantonese, Guangzhou–Hong Kong)⁺
    • Jyutping: ou¹ pi¹
    • Yale: ōu pī
    • Cantonese Pinyin: ou¹ pi¹
    • Guangdong Romanization: ou¹ pi¹
    • Sinological IPA ^(key): /ou̯⁵⁵ pʰiː⁵⁵/

Proper noun

OP

1. (Hong Kong) Ocean Park Hong Kong

German

Etymology

• (medical senses) From the first two syllables of Operation.

Pronunciation

• IPA^(key): /oˈpeː/

• Audio (Germany (Berlin)):

  (file)

Noun

OP f (genitive OP, plural OPs)

1. (surgery, also colloquial) short for Operation

   Alternative form: (earlier) Ope

Declension

Declension of OP [feminine]

	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 (ope)

Noun

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

1. (surgery) short for Operationssaal
2. (electronics) short for Operationsverstärker

Declension

Declension of OP [masculine, strong]

	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 [neuter, strong]

	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

• ED(エンディング) (endingu)

Descendants

• English: OP
• Chinese: OP

Etymology 2

Pronunciation

• IPA^(key): [o̞ːpɯ̟̃ɴ]

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