(figuratively, derogatory) empty shell

garbage chute

(astronomy) interstellar void, interstellar medium / (figuratively) something completely devoid of any substance; wasteland

funny turn, bad patch, slump, dry spell

plural of passage à vide

(of an engine) to tick over, to idle, to run idle / (figuratively) to spin one's wheels, to go round in circles, to go nowhere

acrophobia, fear of heights; vertigo

(figuratively) in vain (without result) / (figuratively) into space

on an empty stomach

(especially Quebec) a sudden impulse to fall or jump from a height; an attack of vertigo