1. without a head.
  2. having the head cut off; beheaded.
  3. having no leader or chief; leaderless.
  4. foolish; stupid: a headless argument.

Origin of headless

before 1000; Middle English he(ve)dles, Old English hēafodlēas. See head, -less
Related formshead·less·ness, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for headless


  1. without a head
  2. without a leader
  3. foolish or stupid
  4. prosody another word for catalectic
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

Word Origin and History for headless

late Old English, heafedleas; see head (n.) + -less. Late 14c. as "rulerless, lacking a leader." Related: Headlessly; headlessness.

Online Etymology Dictionary, © 2010 Douglas Harper