op.

US 
UK 
abbr.
1.
(=opera)
2.
(=operation)
3.
(=opposite)
4.
(=opus)
5.
(=opposite)
1.
(=opera)
2.
(=operation)
3.
(=opposite)
4.
(=opus)
5.
(=opposite)

Sample Sentence

Definition:
Category:AllAll,OralOral,WrittenWritten,TitleTitle,TechnicalTechnical
Source:AllAll,DictionaryDictionary,WebWeb
Difficulty:AllAll,EasyEasy,MiddleMiddle,HardHard