headless

adjective

1. 1

   Without a head; decapitated.

   “How did the headless horseman see to chase Ichabod?”

2. 2

   Without leadership.

   “The headless army blundered along after the death of their general, accomplishing nothing.”

3. 3

   (of a phrase or compound) Not having a head morpheme or word.

4. 4

   Running without a graphical user interface; running without any attached output device (e.g., monitor) or input device (e.g., keyboard, mouse).

5. 5

   (of beer) Without a head of foam.

6. 6

   Heedless.