Jackknife Definition
jackknife
noun
- a large knife with one or more folding blades
- a dive in which the diver bends to touch the ankles before straightening out
verb
- dive into the water bending the body at the waist at a right angle, like a jackknife
Usage tips for "jackknife"
Understanding the precise definition of a word helps you use it with confidence. When using "jackknife" in your writing, consider whether you need the word itself or one of its synonyms — subtle differences in meaning can change the tone of a sentence. If you're writing poetry or song lyrics, check the rhymes for jackknife to find words that pair well.