tell·ing [telling tellingly] BrE [ˈtelɪŋ] NAmE [ˈtelɪŋ] adjective
1. having a strong or important effect; effective
•a telling argument
•Although he didn't score a goal, Tevez made a telling contribution to the game.
2. showing effectively what sb/sth is really like, but often without intending to
•The number of homeless people is a telling comment on the state of society.
Derived Word: ↑tellingly
•These are telling points, but the argument is by no means over.