a caterpillar tread that runs over and under the rear or driving wheels of a vehicle but is not connected with the forward wheels: used especially on military vehicles.
a motor vehicle with rear driving wheels on caterpillar treads.
Military. an armored vehicle equipped with half-tracks.
Origin of half-track
First recorded in 1925–30
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for half-track
Historical Examples of half-track
a vehicle with caterpillar tracks on the wheels that supply motive power only
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Online Etymology Dictionary, © 2010 Douglas Harper