if

'if' in Webster

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In depth article on if found in wikipedia.


If   (?), conj. [OE. if, gif, AS. gif; akin to OFries. ief,
gef, ef, OS. ef, of, D. of, or, whether, if, G. ob whether, if, OHG. oba,
ibu, Icel. ef, Goth. iba,
ibai, an interrogative particle; properly a case form of a noun meaning, doubt (cf. OHG.
iba doubt, condition, Icel. if,
ef, ifi, efi), and therefore orig. meaning,
on condition that.]
 1. In
case that; granting, allowing,
or supposing that; -- introducing
a condition or supposition.
Tisiphone, that oft hast heard my prayer,
 Assist, if &OElig;dipus deserve thy care.
 Pope.
 
If thou be
the Son of God, command that these stones be made bread.
 Matt. iv.
3.
 2. Whether; --
in dependent
questions.
 
Uncertain
if by augury or chance.
 Dryden.
She doubts if two and
two make four.
 Prior.
 As if, But if. See under As, But.

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