Also found in: Dictionary, Thesaurus, Medical, Legal, Financial, Acronyms, Encyclopedia, Wikipedia.
Typically said of an apartment building that has become a cooperative (or "co-op")—a building in which residents do not own property but rather own shares in the corporation that owns the building. I can't believe that our building is going co-op—I might need to move.
a time or event designed for taking pictures of a celebrity. All the photographers raced toward a photo op with the president.
See also: OP
n. other people’s cigarettes; begged or borrowed cigarettes. (Initialism.) My favorite kind of cigarettes is OP’s. They’re the cheapest, too.