A folding knife with a blade which opens automatically (under spring pressure) when a button is pressed.

(transitive) To attack or cut with a switchblade. / (intransitive) To spring open or up. / (transitive, intransitive) To (cause to) make a sudden move or transition.

plural of switchblade

Third-person singular simple present indicative form of switchblade

simple past tense and past participle of switchblade

Armed or equipped with a switchblade. / Sharp or cutting.

present participle of switchblade