1 jackknife /ˈʤækˌnaɪf/ noun plural jackknives
plural jackknives
Learner's definition of JACKKNIFE
[count]
1
: a small knife that has a folding blade : pocketknife 小折刀 2
: a dive in which you bend from the waist and touch your ankles and then straighten out屈體跳水;鐮刀式跳水
2 jackknife /ˈʤækˌnaɪf/ verb
jackknifes; jackknifed; jackknifing
2 jackknife
/ˈʤækˌnaɪf/
verb
jackknifes; jackknifed; jackknifing
Learner's definition of JACKKNIFE
[no object]
: 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(大貨車失控時駕駛室與後半部車體間)彎折成V形