Meaning

noun an institution created to conduct business

noun small military unit; usually two or three platoons

noun the state of being with someone

originFrom Middle English companye (“a team; companionship”), from Old French compaignie (“companionship”) (Modern French: compagnie), possibly from Late Latin *compania, but this word is not attested. Old French compaignie is equivalent to Old French compaignon (Modern French: compagnon) + -ie. More at companion. Displaced native Old English werod, gefer, getæl, and hired.

Etymology from Wiktionary, CC BY-SA 3.0