The Collaborative International Dictionary
An if
An \An\, conj. [Shortened fr. and, OE. an., and, sometimes and
if, in introducing conditional clauses, like Icel. enda if,
the same word as and. Prob. and was originally pleonastic
before the conditional clause.]
If; -- a word used by old English authors.
--Shak.
Nay, an thou dalliest, then I am thy foe.
--B. Jonson.
An if, and if; if.
Wiktionary
an if
alt. (context archaic English) if. conj. (context archaic English) if.
Usage examples of "an if".
Kirk said, "that doesn't mean much to a woman if she's bound to go her own way.