Pertaining to the start or beginning of a series of events.

An act or instance of making or becoming open. / A gap permitting passage through. / An act or instance of beginning. / The first performance of a show or play by a particular troupe.

Accommodating attitude or opinion, as in receptivity to new ideas, behaviors, cultures, peoples, environments, experiences, etc., different from the familiar, conventional, traditional, or one's own.

simple past tense and past participle of open

plural of open

Third-person singular simple present indicative form of open

plural of opening

plural of openness

The quality of being openable.

Capable of being opened.