Is “Iff” a Scrabble word?
Yes
IFF
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Iff
conjunction
1.If and only if; used to show that the truth values of two statements are the same.
2.Logically equivalent to rephrases:
“A rectangle is a square iff all four of its sides have the same length.”
3.Obsolete spelling of if.