Entry 2 senses · 2 variants Webster, 1913 half-track · IPA adj. n. 01 adj. having caterpillar treads on the rear and wheels in front; as, half-track armored vehicles. 1. having caterpillar treads on the rear and wheels in front; as, half-track armored vehicles. Syn. half-track. 02 n. a half-tracked vehicle; -- used mostly of armored military vehicles. 1. a half-tracked vehicle; -- used mostly of armored military vehicles.