undefined is a valid English word

Scrabble validity: valid ( international - Sowpods, US - Twl06 )
iScramble validity: valid
QuickWords validity: valid

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Meanings

Adjective (NOT COMPARABLE)

Not comparable
    Lacking a definition or value. (mathematics computing) That does not have a meaning and is thus not assigned an interpretation.

undefined is a Scrabble valid word


undefined is an iScramble valid word


undefined is an QuickWords valid word


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Same letters words (Anagrams)


Same letters plus one


Same letters minus one