(intransitive) To come to pass; to develop; to occur; to take place; to happen; to exist.

Used other than figuratively or idiomatically: see come, out. / To be discovered, be revealed. / To be published, be issued.

(idiomatic) by the way; now that I think about it; indicates something brought to mind.

To reach by moving down or reducing. / (idiomatic) To entirely depend upon a single factor; basically, ultimately or in essence.

(intransitive, of two opponents) To confront each other decisively. / (intransitive) To attempt to face or resolve an internal contradiction or difficulty.

(idiomatic, of two or more parties, often with a prepositional phrase) to reach an agreement or settle a dispute.

(originally) To fall headlong from a horse. / (Britain, idiomatic) To suffer some accident or misfortune; to fail.

(idiomatic) To confess; admit the truth. / 1921, B. M. Bower, chapter 6, in Sawtooth Ranch: / 1977 Oct. 23, John Gardner, "The World Of Tolkien," New York Times (retrieved 12 Sept 2013):

Used other than figuratively or idiomatically: see come, across. / (figuratively) To change sides; to cross over to work for the opposition.

(idiomatic, informal, by ellipsis) A polite formula used when one has not heard or understood what has been said, or to indicate surprise.