tell on

US /tel ɑːn/

UK /tel ɑːn/

1.

to inform an authority figure about someone's bad behavior

:

•

If you don't stop, I'm going to tell on you.

•

The little boy decided not to tell on his sister.

:

report inform on snitch on rat on peach on

:

tell tell off telling-off tell-all tell apart to tell the truth tell the time