Meaning of A in English

A

abbr. (also A.) 1 Brit. (of films) classified as suitable for an adult audience but not necessarily for children. °Now replaced by PG. 2 = A LEVEL. 3 ampere(s). 4 answer. 5 Associate of. 6 atomic (energy etc.).

Concise Oxford English dictionary.      Краткий оксфордский словарь английского языка.