The regular times of day when a shop, office or similar is open to the public.

The credits shown at the beginning of a film, TV program, etc.

(finance) The beginning of formal trading on an exchange, usually signalled by the opening bell.

A ceremony to mark the official opening of a building or event.

(cricket) The first batsman of an innings. / (cricket) One of the first two batsmen of an innings. / (figuratively) The first of a series, usually a chronological series.

plural of opening batsman

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

present participle of open fire

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

A chess opening in which white begins by playing 1.c4, moving his queen bishop's pawn to the fourth rank.