Relating to the whole of something.

That, and everything similar; all of that kind of thing; and so on, et cetera.

(US, slang) Of especially good quality; particularly excellent.

(idiomatic) Very.

(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.

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

Very nearly; everything short of.

(emphatic) Not in the least.

(idiomatic) Used similarly to you're welcome, as a conventional reply to an expression of gratitude. / (idiomatic) Don't worry about it (response to worry or an apology)