A verification of the factuality of specific information.

(archaic) A person employed to collect admission tickets at a theatre or on a train, etc.

plural of check-taker

(travel, aviation) the part of a boarding pass, or a separate stub, that identifies the passengers baggage and permits it to be collected at the destination.

plural of check-up

(most often in phrasal verb "check up on") To verify through brief investigation or revisit for assurance that there are no problems. / To verify something's accuracy.

plural of check swing

(baseball) A checked (halted, partial) swing of the bat.

A clerk who checks accounts, etc.

plural of check clerk