factor

1 a person who acts or does business for another at the auction the high bidder for the painting was actually a factor for a wealthy art collector Synonyms assignee, attorney, commissary, delegate, deputy, envoy, agent, minister, procurator, proxy, rep, representativeRelated Words ambassador, diplomat, diplomatist, emissary, foreign minister, legate, plenipotentiary; alternate, backup, pinch hitter, relief, replacement, stand-in, sub, substitute, surrogate, understudy; informer, operative, spy; broker, distributor, manager; arbiter, arbitrator, comprador (or compradore), conciliator, go-between, intercessor, intermediary, interposer, liaison, mediator, middleman, peacemaker; mouthpiece, point man, point person, prophet, speaker, spokesman, spokesperson

2 one of the parts that make up a whole price was only one factor in my decision to buy the car Synonyms building block, component, constituent, element, ingredient, memberRelated Words basis, part and parcel; detail, item, particular, point; aspect, characteristic, facet, feature, trait; division, fragment, particle, partition, piece, portion, section, sector, segment; subcomponentNear Antonyms aggregate, composite, compound, mass; entirety, sum, summation, total, totality; admixture, amalgam, amalgamation, blend, combination, intermixture, mix, mixtureAntonyms whole