A unit of a housing cooperative; a purchased apartment where the apartment owners collectively are responsible for maintenance of common areas and upkeep.

Synonym of cooperate

A newspaper page containing signed articles by commentators expressing viewpoints that may not agree with those espoused by the editorial board, traditionally printed opposite the editorial page.

Of or being a newspaper page, usually opposite the editorial page, that features signed articles expressing personal viewpoints. / Of an article, written in a style suitable for publication as an op-ed.

(transitive, intransitive, rare) To write an op-ed article.

Happening before an operation. / Not yet operated on.

(medicine) A preoperative patient or procedure. / (LGBT) A preoperative trans person.

(informal) A photo opportunity.

(art) A genre of abstract art that uses geometric shapes and vivid colours to create optical illusions, such as an illusion of movement.

(Canada) An illegal marijuana-growing operation, usually indoors.