telling

definition: producing a strong effect
example:
speech part: adjective
synonyms: impressive
definition: disclosing unintentionally
example: a telling smile
speech part: adjective
synonyms: revealing telltale
definition: powerfully persuasive
example:
speech part: adjective
synonyms: weighty cogent
definition: disclosing information or giving evidence about another
example:
speech part: noun
synonyms: singing tattle
definition: informing by words
example:
speech part: noun
synonyms: notification
definition: an act of narration
example:
speech part: noun
synonyms: relation

How telling is being used?