1. without a head; specif.,
a. organically without a head; acephalous
3. stupid; brainless
Webster’s New World College Dictionary, Fourth Edition, compiled by the
editors of Webster’s New World Dictionaries. Copyright © 2010 by Houghton
Mifflin Harcourt. Published by Houghton Mifflin Harcourt. All rights reserved.
Word origin of 'headless'ME hevedles < OE heafodleas