Definition of mindless
1a
: marked by a lack of mind or consciousness
a mindless sleep
b(1)
: marked by or displaying no use of the powers of the intellect
mindless violence
(2)
: requiring little attention or thought
especially
: not intellectually challenging or stimulating
mindless work a mindless movie
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Merriam-Webster unabridged
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Time Traveler for mindless
The first known use of mindless was before the 12th century
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