Definition of undefined
: not defined: such as
a
: not clearly or precisely shown, described, or limited
undefined rules undefined powers a vague, undefined feeling of dread … the true outlines of Clinton's foreign policy remain undefined.— William Greider
b
: not provided with a definition
an undefined dictionary entry
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Great Words for Scrabble
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Merriam-Webster unabridged
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Time Traveler for undefined
The first known use of undefined was in 1611
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