1
as in to split (on)
to give information (as to the authorities) about another's improper or unlawful activities
how much—or how little—did the fuzz have to pay you to rat on us?
Synonyms & Similar Words
Relevance
2
as in to desert
to leave (a cause or party) often in order to take up another
many party operatives ratted on the senator's candidacy once her poll numbers started to slip
Synonyms & Similar Words
Antonyms & Near Antonyms
Example Sentences
Recent Examples of Synonyms for rat (on)
Verb
-
About a third of Californians live in what’s called the wildland-urban-interface, where human settlements overlap with wildlife habitat like forests, mountain foothills or desert open space, Crowfoot said.—
Sharon Bernstein,
Sacbee.com,
28 Jan. 2026 -
In the end, in 1992, more than two-thirds of white people, motivated by fear and economic uncertainty, deserted the apartheid regime.—
Eve Fairbanks,
The Dial,
27 Jan. 2026
Verb
-
As the industry now begins talking seriously about agentic AI, a more independent and decision-capable form of artificial intelligence, the question is no longer whether AI will reshape cars, but how far it should be allowed to go.—
Peter Lyon,
Forbes.com,
27 Jan. 2026
-
Many survivors have been helped by talking things through with a licensed psychotherapist.—
Jeanne Phillips,
Mercury News,
27 Jan. 2026
Verb
-
Supervisors Shanti Landon, Anthony DeMattei and Suzanne Jones made up the three votes rejecting the loan.—
Ashley Sharp,
CBS News,
27 Jan. 2026
-
Kaiser flatly rejects the notion that the strike is about anything other than reimbursement.—
Paul Sisson,
San Diego Union-Tribune,
27 Jan. 2026
Verb
-
Because in the end, the role of the CFO is to inform the decision.—
Melissa Houston,
Forbes.com,
27 Jan. 2026
-
Tobay Robles' lawyers informed the court on Friday that his client had not received a bond hearing and was still in immigration custody.—
Melissa Quinn,
CBS News,
27 Jan. 2026
Verb
-
Restaurant tables sat empty, business windows went dark and students’ desks were abandoned in several cities across the country Friday amid a nationwide strike in protest of the federal immigration crackdown in Minnesota.—
Elizabeth Wolfe,
CNN Money,
31 Jan. 2026
-
According to charging documents, officers later found Seymour’s apartment unlocked and abandoned, her vehicle parked at Salt Lake City International Airport, and a notebook outlining plans to discard phones and documents.—
Stepheny Price,
FOXNews.com,
31 Jan. 2026
Verb
-
Cumming said the city's information technology department also abruptly cut off part of her office administrator's access, including the ability to see who else in city government may be looking at whistleblower complaints and documents related to ethics investigations.—
Mike Hellgren,
CBS News,
28 Jan. 2026
-
The drug cuts off access to vitamin A in the testes by blocking a receptor known as RAR alpha.—
Ana Castelain,
Bloomberg,
28 Jan. 2026
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Cite this Entry
“Rat (on).” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/rat%20%28on%29. Accessed 1 Feb. 2026.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
