plural of open set

plural of open valley

plural of open compound

(mathematics) an interval in the real number line which does not contain its supremum and infimum. If specified by a pair of real numbers, then it consists of all the points on the real line whose values lie strictly between those two real numbers.

plural of open book

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

simple past tense and past participle 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