Meaning of telling
Definition of telling
(adj)
disclosing unintentionally something concealed; "a telling smile"; "a telltale panel of lights"; "a telltale patch of oil on the water marked where the boat went down"
powerfully persuasive; "a cogent argument"; "a telling presentation"; "a weighty argument"
(noun)
an act of narration; "he was the hero according to his own relation"; "his endless recounting of the incident eventually became unbearable"