definition of
companion

[1] #1 companion n. [comrade, fellow, familiar, associate] a friend who is frequently in the company of another; "drinking companions"; "comrades in arms". wn

[2] #2 companion n. [fellow traveler, fellow traveller] a traveler who accompanies you. wn

[3] #3 companion v. [company, accompany, keep company] be a companion to somebody. wn

[4] #4 companion n. one paid to accompany or assist or live with another. wn