Meaning of ALREADY in English

ALREADY

■ adverb

1》 before the time in question.

↘as surprisingly soon or early as this.

2》 N. Amer. informal an expression of impatience: enough ~ with these crazy kids!

Origin

ME: from all + ready ; sense 2 is influenced by Yiddish use.

Concise Oxford English vocab.      Сжатый оксфордский словарь английского языка.