Definitions
There are 2 meanings of the phrase
Tell On.
Tell On - as a verb
Give away information about somebody
Example: "He told on his classmate who had cheated on the exam"
Synonyms (Exact Relations)
betraydenouncegive awaygrassratshopsnitchstagHypernyms (Closely Related)
informHyponyms (Broadly Related)
Produce an effect or strain on somebody
Example: "Each step told on his tired legs"
Example Sentences
"I promised my sister that I wouldn't tell on her if she let me play with her toys."
"She threatened to tell on me if I didn't give her the candy."
"Please don't tell on me, I'll do anything you want!"
"The kids made a pact not to tell on each other if they skipped school."
"He didn't want to get in trouble, so he decided to tell on his friend who stole the cookies."