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
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Before assuming the new borrowing limits apply to you, talk with your financial aid office.
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Above, her mother’s brother, Abdullahi Mohamed, cradled a cup of tea in his hands and talked to her parents about their Central Avenue community, the news of the day and the global events that dominated the early 2000s.
Verb
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Ghulam Ali whipped his head around to see if anyone else was there, but the fields were deserted at this time of day.
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And a $208 million Rural Health Transformation award now lets Arkansas confront the maternity care deserts the national conversation overlooks—because when the nearest delivery unit is an hour away, distance itself is a risk factor.
Verb
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Emergency responders arrived on the scene and were informed that the victim had been pulled by the current flowing through Sebonac Creek into the Great Peconic Bay, the statement said.
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The company also informed members about 2026 premium changes through phone calls, text messages, regular mail, or email, Baiocchi said.
Verb
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Critics see it as another attempt to breathe life into claims that courts, investigators and election officials have repeatedly rejected — and another corrosive attempt to undermine faith in the state’s vote.
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Questioning, if not rejecting, established Christian doctrine, Ahab also comes to regard Moby Dick as the outward and visible sign, the physical embodiment of the indifference or, worse, utter malignity inherent in the universe.
Verb
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According to the American Medical Association, 78% of physicians report that prior authorization delays have led patients to abandon recommended treatment.
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Later that day, deputies found her van abandoned in a field near Interstate 95, but Graham had seemingly vanished without a trace.
Verb
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Ukraine has stepped up attacks on Russian oil facilities and military assets in recent weeks, seeking to cut off Moscow’s energy revenues and try to raise the political pressure on the Kremlin.
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Another method is to cut off oxygen to the fire by using a snuffing lid, then let the fire burn out naturally.
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Cite this Entry
“Rat (on).” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/rat%20%28on%29. Accessed 7 Jul. 2026.
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