undefined is a valid English word

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

Meanings

Adjective (NOT COMPARABLE)

Lacking a definition or value.
(mathematics computing) That does not have a meaning and is thus not assigned an interpretation.
• The result of division by zero is undefined.

undefined is a Scrabble valid word

undefined

• International English (Sowpods) - The word is valid in Scrabble ✔
• US English (TWL06) - The word is valid in Scrabble ✔
• 00 points

undefined is an iScramble, QuickWords valid word

undefined

• The word is valid in iScramble ✔
• The word is valid in QuickWords ✔
• 00 points

Same letters words (Anagrams)

• none

Same letters plus one

• REINFUNDED
• UNFRIENDED

Same letters minus one

• DEFINNED
• UNDEFIDE
• UNDEFIED
• UNDEFINE
• UNDENIED