(idiomatic) Very.

Completely in favour of. / (of an undertaking) Merely for the sake of.

(somewhat dated) Very tired. / (chiefly UK) With everything included. / (poker) Having no further stake to wager, but remaining active in a hand.

(poker) A hand where at least one player bets all of his or her chips. / (poker) A player who is all in.

(idiomatic) Mentally competent; not absent-minded or insane. / Used other than figuratively or idiomatically: see all, there.

(informal) Used at the end of a statement to insinuate that there is more information that can be inferred from the preceding.

Alternative form of all in

Alternative form of all in

Alternative form of all in

(grammar) Of or relating to the grammatical case that in some languages indicates motion towards a place.