n. 25B6; noun
she has to smile in her business : WORK, line (of work), occupation, profession, career, employment, job, position; vocation, calling; field, sphere, trade, craft; informal racket, game; archaic employ.
who do you do business with? : TRADE, trading, commerce, dealing, traffic, merchandising; dealings, transactions, negotiations.
her own business : FIRM, company, concern, enterprise, venture, organization, operation, undertaking; office, agency, franchise, practice; informal outfit, set-up.
none of your business : CONCERN, affair, responsibility, duty, function, obligation; problem, worry; informal pigeon, bailiwick; Brit. informal lookout.
an odd business : AFFAIR, matter, thing, case, circumstance, situation, event, incident, happening, occurrence; episode.
corporate.