from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Lacking intelligence or good sense; foolish.
- adj. Having no intelligent purpose, meaning, or direction: mindless violence.
- adj. Giving or showing little attention or care; heedless: mindless of the dangers.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Showing a lack of forethought or sense.
- adj. Having no sensible meaning or purpose.
- adj. Heedless.
- adj. Overly repetitive and unchallenging.
- adj. Lacking a mind.
from the GNU version of the Collaborative International Dictionary of English
- adj. Not indued with mind or intellectual powers; stupid; unthinking.
- adj. Unmindful; inattentive; heedless; careless.
from The Century Dictionary and Cyclopedia
- Without mind; wanting power of thought; brutish; stupid; inanimate.
- Unmindful; thoughtless; heedless; careless.
- Not exhibiting or denoting thought; void of sense; irrational; inane: as, “mindless activity,”
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. not mindful or attentive
- adj. requiring little mental effort
- adj. devoid of intelligence
- adj. not marked by the use of reason
- adj. lacking the thinking capacity characteristic of a conscious being
From Middle English myndeles, from Old English myndlēas ("foolish, senseless"), equivalent to mind + -less. (Wiktionary)