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cross the aisle

(chiefly, British, and, Canada, idiomatic, politics) Of a member of a parliament, to resign from one's political party and join another party, resulting in moving from one's currently assigned desk or

ˈkɹɔs ðə ˈaɪl45 viewsLast reviewed Jun 29, 2026+ Add a definition
🇬🇧 British & Irish slang
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UK
#1·Apr 27, 2026UK

(chiefly, British, and, Canada, idiomatic, politics) Of a member of a parliament, to resign from one's political party and join another party, resulting in moving from one's currently assigned desk or seat in the legislative chamber to a new desk or seat physically located with the other members of one's new party.

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UK
#2·Apr 27, 2026UK

(chiefly, US, idiomatic, politics) To vote, unite, or otherwise co-operate with members of another political party in order to achieve governmental or political action.

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🇬🇧About British & Irish slang slang

UK and Irish slang — Cockney, Scouse, Geordie, Yorkshire, Glaswegian, Brummie, Welsh, West Country, plus Irish English. Centuries of regional dialects feeding into modern British and Irish street talk.

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