Noun
An edifice in which dramatic performances or spectacles are exhibited for the amusement of spectators; anciently uncovered, except the stage, but in modern times roofed.
Any room adapted to the exhibition of any performances before an assembly, as public lectures, scholastic exercises, anatomical demonstrations, surgical operations, etc.
That which resembles a theater in form, use, or the like; a place rising by steps or gradations, like the seats of a theater.
A sphere or scheme of operation.
A place or region where great events are enacted; as, the theater of war.
Source: Webster's dictionaryA good drama critic is one who perceives what is happening in the theatre of his time. A great drama critic also perceives what is not happening. Kenneth Tynan
But men must know, that in this theatre of man's life it is reserved only for God and angels to be lookers on. Francis Bacon
The pit of a theatre is the one place where the tears of virtuous and wicked men alike are mingled. Denis Diderot
I think theatre should always be somewhat suspect. Václav Havel
When I come into the theatre I get a sense of security. I love an audience. I love people, and I act because I like trying to give pleasure to people. Vivien Leigh
It's one of the tragic ironies of the theatre that only one man in it can count on steady work - the night watchman. Tallulah Bankhead