Meaning of UNIFORM in English

UNIFORM

I. u ‧ ni ‧ form 1 S3 /ˈjuːnəfɔːm, ˈjuːnɪfɔːm $ -ɔːrm/ BrE AmE noun [uncountable and countable]

1 . a particular type of clothing worn by all the members of a group or organization such as the police, the army etc

school/army/police etc uniform

He was still wearing his school uniform.

2 . in uniform

a) wearing a uniform:

He was on duty and in uniform.

b) in the Army, Navy etc:

my 33 years in uniform

II. uniform 2 AC BrE AmE adjective

[ Date: 1500-1600 ; Language: French ; Origin: uniforme , from Latin uniformis , from uni- + -formis (from forma 'form' ) ]

being the same in all its parts or among all its members:

Grade A eggs must be of uniform size.

—uniformly adverb

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