英语释义
1. a large strong pocketknife
2. a dive executed headfirst in which the diver bends from the waist and touches the ankles while holding the knees unbent and then straightens out
3. to double up like a jackknife
jackknifed into a seat beside me, folding up his six feet eight
— Lady Bird Johnson
4. to turn and form an angle of 90 degrees or less with each other —used especially of a tractor-trailer combination
5. to cause to double up like a jackknife
6. to cut with a jackknife
7. a small knife that has a folding blade
8. a dive in which you bend from the waist and touch your ankles and then straighten out
9. to bend in the middle like a folding jackknife especially, of a large truck to have the back part slide out of control toward the front part
10. a knife that has a folding blade or blades and can be put in a pocket
11. to double up like a jackknife