Merriam-Webster's Collegiate® Dictionary, 11th Edition
LOCOMOTIVE
I. adjective
Date: 1612
locomotory , of or relating to travel, of, relating to, or being a machine that moves about by operation of its own mechanism,
II. noun
Date: 1829
a self-propelled vehicle that runs on rails and is used for moving railroad cars, a school or college cheer characterized by a slow beginning and a progressive increase in speed