noun, masculine
- companion (someone with whom one spends time or keeps company)
- mate, colleague; (with a qualifier) fellow X, classmate, coworker, etc. (someone with whom something is shared)
- fellow member of a political group; comrade
- teammate (one who is on the same team)
- mate, partner (matching item in a set)
- partner, significant other (especially not a spouse)
- figuratively companion (a thing or phenomenon that is closely associated with another thing, phenomenon, or person)
- friendly term of address; friend, buddy