Definition of already adverb from the Oxford Advanced Learner's Dictionary

Oxford3000

already

adverb
ɔːlˈredi
 
; ɔːlˈredi
 
 
1 before now or before a particular time in the past‘Lunch?’ ‘No thanks, I've already eaten.’We got there early but Mike had already left.2 used to express surprise that something has happened so soon or so earlyIs it 10 o'clock already?You're not leaving already, are you?3 used to emphasize that a situation or problem existsI'm already late.There are far too many people already. We can't take any more.
Idioms
see
enough already at enough det.
Usage noteUsage note: already / just / yetAlready and yet are usually used with the present perfect tense, but in North American English they can also be used with the simple past tense:I already did it. Did you eat yet?However, this is much more common in spoken than in written English and some Americans do not consider it acceptable, even in speech. The present perfect is more common in North American English and almost always used in British English:I’ve already done it. Have you eaten yet?Just is mostly used with the perfect tenses in British English and with the simple past in North American English:I’ve just had some bad news. (British English) I just got some bad news. (North American English)