iff

"if and only if"

• (UK) IPA^(key): /ɪf ən(d) ˈəʊn.li ɪf/
• (US) IPA^(key): /ɪf ən(d) ˈoʊn.li ɪf/

iff

1. (mathematics, logic) Short for if and only if.

   A rectangle is a square iff all four of its sides have the same length.

• if

iff

1. Obsolete spelling of if.
   • 1565, Thomas Stapleton, A Fortreſſe of the Faith &c., Ihon Laet, the 2. part. 112:

     For iff the patient be aſhamed to diſcloſe hiſ wounde to the phyſician which knoweth it not , phyſicke can not helpe him.

• FFI, FIF, Fif.

(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.)

iff (Tifinagh spelling ⵉⴼⴼ)

1. (intransitive) to surpass, to be better, to be worth more

This verb needs an inflection-table template.

• Verbal noun: tifet

Cognate with Northern Saharan Berber iff (“udder”).

iff m (Tifinagh spelling ⵉⴼⴼ, plural iffan)

1. nipple
2. udder

   Synonyms: abbuc, tinɣi

   iffan n tfunast.

   The udders of a cow.