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From Middle English heedles, hevedles, from Old English hēafodlēas (headless), equivalent to head +‎ -less. Cognate with Dutch hoofdloos (headless), Danish hovedløs (headless), Swedish huvudlös (headless), Icelandic höfuðlaus (headless).


headless (not comparable)

  1. Without a head; decapitated.
    How did the headless horseman see to chase Ichabod?
  2. Without a head in the sense of leadership.
    (Can we find and add a quotation of Sir W. Raleigh to this entry?)
    The headless army blundered along after the death of their general, accomplishing nothing.
  3. (linguistics, of a phrase or compound) Not having a head morpheme or word.
  4. (computing) Running without a user interface; specifically, running without a monitor, keyboard, and mouse.
    • 2003, William Boswell, Inside Windows Server 2003, Addison-Wesley, ISBN 978-0-7357-1158-7, page 62:
      /redirect. Used for console redirection in headless servers.
    • 2007, Carla Schroder, Linux Networking Cookbook, O’Reilly Media (2008), ISBN 978-0-596-10248-7, page 47:
      Routers typically run headless, without a keyboard or monitor.
    • 2010, Charles Bell et al., MySQL High Availability: Tools for Building Robust Data Centers, O'Reilly Media, ISBN 978-0-596-80730-6, page 278:
      This is not unexpected for a Windows system running as a virtual machine or a headless server []
  5. (of beer) Without a head of foam.
  6. (obsolete) Destitute of understanding or prudence; foolish; rash.
    Witless headiness in judging or headless hardiness in condemning. — Spenser.

Derived terms[edit]