- 1to tell someone, especially someone in authority, about something bad that someone else has done synonym tell
- 2 You should learn that you just don't tattle on classmates.
NAmE//ˈtæt̮l//[intransitive]tattle (on somebody) (to somebody)(informal)(disapproving)Verb Forms present simple I / you / we / they tattle
he / she / it tattles
past simple tattled
-ing form tattling