iff

Pronunciation:  US [ɪf] UK [ɪf]
  • conj.If and only if; and only ... Shi
  • abbr.(=
  • WebInternational Finance Forum (International Finance Forum) and IFF (Identification Friend of Foe), identification friend or foe system
conj.
1.
a word used in mathematics and logic meaning  if and only if” 
abbr.
1.
(= identification)