Wiktionary
alt. A person who checks that passengers on a train etc have a valid ticket, and marks it so that it cannot be used again. n. A person who checks that passengers on a train etc have a valid ticket, and marks it so that it cannot be used again.
Usage examples of "ticket inspector".
Then he raised his eyes and saw the uniform of another ticket inspector in the corridor outside, and he seemed to smile cynically under his make-up.
I had imagined the gods to be some kind of ticket inspector who would always know if you hadn't paid your fare, and if you hadn't would inflict a substantial fine.
But when I listened to commuters talking in the pub they said that these days the ticket inspector rarely, if ever, put in an appearance.
He wondered if he should get out his wand and start tapping the ticket inspector’.
He wondered if he should get out his wand and start tapping the ticket inspector's stand between platforms nine and ten.
Then the ticket inspector came, and then the customs officer, and then two immigration inspectors with an army officer in tow, and a security official in civilian clothes.
A ticket inspector coming on duty (Frank Evans, eighteen years' service with British Rail, already a national hero) had heard what seemed to be a cat hissing among the mailbags in the skip.
The tiny oddly-shaped bit of card which a ticket inspector cuts out of a ticket with his clipper for no apparent reason.