anything done or to be done; anything requiring action or effort; business; concern

an affair of great importance.

affairs, matters of commercial or public interest or concern; the transactions of public or private business or finance

affairs of state; Before taking such a long trip you should put all your affairs in order.

an event or a performance; a particular action, operation, or proceeding

When did this affair happen?

thing; matter (applied to anything made or existing, usually with a descriptive or qualifying term)

Our new computer is an amazing affair.

a private or personal concern; a special function, business, or duty

That's none of your affair.

an intense amorous relationship, usually of short duration.

an event or happening that occasions or arouses notoriety, dispute, and often public scandal; incident

the Congressional bribery affair.

a party, social gathering, or other organized festive occasion

The awards ceremony is the biggest affair on the school calendar.

noun

assignment , avocation , calling , case , circumstance , concern , duty , employment , episode , event , hap , happening , incident , interest , job , mission , obligation , occupation , occurrence , office function , proceeding , profession , project , province , pursuit , question , realm , responsibility , subject , task , thing * , topic , transaction , undertaking , affaire , amour , carrying on , extracurricular activity * , fling , goings-on , hanky-panky * , intimacy , intrigue , liaison , love , playing around , relationship , rendezvous , romance , thing together , two-timing , do , entertainment , function , gathering , reception , shindig , soiree , business , thing , celebration , festivity , fete , gala , occasion , lookout , love affair , action , activity , endeavor , engagement , issue , party