Meaning of the word "monkey wrench" in English

What does "monkey wrench" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

monkey wrench

US /ˈmʌŋ.ki ˌrɛntʃ/
UK /ˈmʌŋ.ki ˌrɛntʃ/

Noun

a wrench with a movable jaw, used for turning nuts and bolts of various sizes

Example:
He used a monkey wrench to tighten the pipe.
I need a monkey wrench to fix this.