Meaning of A1 in English

A1

ˈā|wən adjective

Etymology: a (I)

1. : having the highest possible classification — used as a symbol by Lloyd's Register of Shipping to designate the characteristics of a ship

2. : of the highest quality : first-class , first-rate , superior

an A1 man of music as well as an A1 man of the orchestra — Virgil Thomson

Webster's New International English Dictionary.      Новый международный словарь английского языка Webster.