Pronunciation (UK) IPA (key): /ˈrɛdʒɪmənt/ Audio (US)(file) Hyphenation: regi‧ment, re‧gi‧ment Noun Singular regiment Plural regiments (countable) (military) A regiment is a unit of armed troops under the command of an officer that consists of several smaller units.Wikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads