Meaning of Z in English

Z

Z BrE AmE , z /zed $ ziː/ ( plural Z’s, z’s ) noun

1 . [uncountable and countable] the 26th and last letter of the English alphabet ⇨ from A to Z at ↑ A 1 (7)

2 . catch/get some Z’s American English informal to sleep

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.