: a wrench with one fixed and one adjustable jaw at right angles to a straight handle
2
: something that disrupts
threw a monkey wrench into the peace negotiations
Illustration of monkey wrench
monkey wrench 1
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Trump is potentially threatening to throw another monkey wrench into the team's plans to return to D.C. after nearly three decades playing in Landover, Maryland.—Jim Reineking, USA Today, 21 July 2025 Though the rain on May 31 threw a massive monkey wrench into the festivities, drawing an apology from Questlove to fans, things got better on June 1 (for the most part).—Andre Gee, Rolling Stone, 2 June 2025 Think of it like the proverbial monkey wrench left in your car’s engine by a careless mechanic.—Howard Cohen, Miami Herald, 30 May 2025 Moments after the judge set a May 27 hearing for the bench trial on damages only, Knight threw a giant monkey wrench into the proceeding.—Nancy Dillon, Rolling Stone, 22 Apr. 2025 See All Example Sentences for monkey wrench
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