a person who shares or is associated with another in some action or endeavor; sharer; associate.

Law .

a person associated with another or others as a principal or a contributor of capital in a business or a joint venture, usually sharing its risks and profits.

special partner.

silent partner.

a husband or a wife; spouse.

either of two people who dance together

my favorite partner in the waltz.

a player on the same side or team as another

My tennis partner was an excellent player.

partners, Nautical . a framework of timber round a hole in a ship's deck, to support a mast, capstan, pump, etc.

to associate as a partner or partners with.

to serve as the partner of.

noun

enemy , foe

noun

accomplice , ally , assistant , associate , buddy , chum * , cohort , collaborator , colleague , companion , comrade , confederate , consort , coworker , crony * , date , friend , helper , helpmate , husband , mate , pal * , participant , playmate , sidekick * , spouse , teammate , wife , affiliate , copartner , fellow , accessory , bedfellow , chum , coadjutor , compeer , confrre , confrere , crony , pal , partaker , sidekick , sparring partner