tattletale

UK: /ˈtæt^əlˌteɪl/ US: /ˈtætəlˌteɪl/ ,(tat′l tāl′)

WordReference Random House Learner's Dictionary of American English © 2025

tat•tle•tale /ˈtætəlˌteɪl/   n. [countable]

1. one who tells something private about another, or betrays another in doing so.

adj. [before a noun]

2. showing evidence of something:
   tattletale crumbs that proved he'd been munching cookies in bed.

WordReference Random House Unabridged Dictionary of American English © 2025

tat•tle•tale  (tat′l tāl′), n. 

1. a talebearer or informer, esp. among children.

adj. 

2. telltale;
   revealing:
   a tattletale smear of lipstick on his collar.

• tattle + tale 1885–90, American.

Collins Concise English Dictionary © HarperCollins Publishers::

tattletale / ˈtæt^əlˌteɪl/ noun

1. a scandalmonger or gossip
2. another word for telltale1