Business  n. 1 one's regular occupation or profession. 2 one's own concern. 3 task or duty. 4 serious work or activity. 5 (difficult or unpleasant) matter or affair. 6 thing(s) needing attention or discussion. 7 buying and selling; trade. 8 commercial firm.  mind one's own business not meddle. [old english: related to *busy]