OP

Abbreviation

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.

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

OP (not comparable)

1. (publishing) Abbreviation of out of print.
2. Abbreviation of overproof.
3. (video games) Abbreviation of overpowered.
   • 2012 August 29, “Re: 5.0.4 first blush”, in alt.games.warcraft‎ (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.

• (out of print): OOP

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

OP

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

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

OP (usually uncountable, plural OPs)

1. Initialism of opening credits.
2. Initialism of opening theme.

• (antonym(s) of “opening credits”): ED
• (antonym(s) of “opening theme”): ED

• http://www.answers.com/topic/op

• P.O., PO, Po, Pô, po, po'

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

OP

1. (chiefly ACG) opening theme, intro sequence

• ED (yìdì)

Initialism of English Ocean Park.

OP

1. (Hong Kong) Ocean Park Hong Kong

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

• IPA^(key): /oˈpeː/

• Audio

  (file)

OP f (genitive OP, plural OPs)

1. (surgery) Initialism of Operation.

• → Japanese: オペ

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

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

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

1. (European politics) Initialism of operationelles Programm.

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

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

OP(オープニング) • (ōpuningu) 

1. (entertainment) opening theme, intro sequence; Abbreviation of オープニング.

• ED(エンディング) (endingu)

• English: OP
• Chinese: OP

• IPA^(key): [o̞ːpɯ̟̃ᵝɴ]

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