Meaning of UNIT in English

UNIT

[unit] n [back-formation fr. unity] (1570) 1 a: the first and least natural number: one b: a single quantity regarded as a whole in calculation

2: a determinate quantity (as of length, time, heat, or value) adopted as a standard of measurement: as a: an amount of work used in education in calculating student credits b: an amount of a biologically active agent (as a drug or antigen) required to produce a specific result under strictly controlled conditions 3 a: a single thing, person, or group that is a constituent of a whole b: a part of a military establishment that has a prescribed organization (as of personnel and materiel) c: a piece or complex of apparatus serving to perform one particular function d: a part of a school course focusing on a central theme e: a local congregation of Jehovah's Witnesses

[2]unit adj (1844): being, relating to, or measuring one unit

Merriam-Webster English vocab.      Английский словарь Merriam Webster.