- by or before a stated or implied time: he is already here
- at a time earlier than expected: is it ten o'clock already?
WordReference Random House Learner's Dictionary of American English © 2016
before some specified or implied time[often with a perfect tense like present perfect or past perfect]I'm sorry, she has already left for the day. She had already arrived and was waiting for you.
- so soon; so early;
sooner than expected:I can't believe she is already here.
- Informal. (used to express exasperation or impatience): Let's go already!
- by this or that time;
prior to or at some specified or implied time:When we came in, we found they had already arrived.
- now; so soon;
so early:Is it noon already?
- [Informal.](used as an intensifier to express exasperation or impatience):Let's go already!
Middle English al redy all ready;
what origin, originally meant "completely (all) ready'' and modified the subject (The porter all ready was there) was taken adverbially as modifying the predicate (The porter already was there, meaning "from an earlier time'')