plural of open compound

(uncountable) A chess opening characterized by the moves 1.e4 e5, in which both White and Black move their king's pawn to the fourth rank with their first move.

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

plural of cold open

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

A device for putting a hole in a pipe. / A device or mechanism for clearing obstructions in a pipe. / (sports) A practice event; a warm-up.

simple past tense and past participle of open fire

present participle of open fire

Third-person singular simple present indicative form of open fire

simple past tense and past participle of open source