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

Third-person singular simple present indicative form of open source

present participle of open source

An unannounced or lightly announced business opening, instead of or prior to a grand opening.

Alternative form of open-and-shut

plural of Open Game