(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.

plural of photo op

plural of co-op

Third-person singular simple present indicative form of co-op

(electronics) A certain active circuit element useful in creating various kinds of amplifiers and filters.