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round on

verb

To turn and attack someone or something.

“As a group of policemen went past him, one of them rounded on him, grabbing him by the arm.”

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Meanings

verbround on (third-person singular simple present rounds on, present participle rounding on, simple past and past participle rounded on)

present singular third person rounds on · participle present rounding on · participle past rounded on · past rounded on

figurativelysometimestransitiveTo turn and attack someone or something.
As a group of policemen went past him, one of them rounded on him, grabbing him by the arm.
2 more examples
But officers from South Wales police, 150 miles away, rounded on him for the decision to go to see his family
2020 March 29, Nazia Parveen, “Stephen Kinnock targeted by police for visiting father, Neil”, in The Guardian
Rail unions also rounded on ministers to intervene in the energy "omnishambles", with ASLEF General Secretary Mick Whelan calling on the Government to "do the right thing for people, the right thing for business, and the right thing for our rail network. Because it is also the right thing for our planet."
2021 October 20, Paul Stephens, “Network News: Electricity prices force Freightliner to revert to diesel”, in RAIL, number 942, page 7
Synonyms: round upon

Synonyms & antonyms

verbTo turn and attack someone or something.

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Cite this entry

APA

round on. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/round%20on

MLA

“round on.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/round%20on. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “round on,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/round%20on.

Source: round on on Wiktionary, CC BY-SA 4.0.