if

conjunction
  1. (introducing a conditional clause) on the condition or supposition that; in the event that.
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If

noun

An uncertainty, possibility, condition, doubt etc.

conjunction
  1. Supposing that, assuming that, in
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iff

conjunction

if and only if (as a written abbreviation).

1950s: arbitrary extension of if .

imf

Inf

abbreviation, noun

intermediate-range nuclear force(s).

inf

infangthief

noun

(in Anglo-Saxon law) the right of the lord of a manor to try and to punish a thief caught within... Read more »

ingulf

verb
  1. To overwhelm.
    Desperation engulfed her after her daughter's death.
  2. To surround; to cover.
    Only Noah
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interleaf

noun
  1. A leaf, often of tissue paper or other thin paper, inserted between the pages of a book to protect
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iof