(television) An opening segment shown before the opening credits.

A museum where the exhibitions are located outdoors.

plural of opt-out

Sufficient money can accomplish anything.

plural of opium poppy

Papaver somniferum, the species of plant from which opium and poppy seeds are extracted.

plural of opera house

A method of aiming an artillery piece with the target in sight (direct fire), as opposed to indirect fire where the target is not visible.

(idiomatic, humorous, in hypothetical constructs) Any kind of event or activity that may contribute to one's self-promotion or visibility in society.

A multi-venue performing arts centre in Sydney, New South Wales, Australia.