If

If 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. [1913 Webster]

Tisiphone, that oft hast heard my prayer, Assist, if [OE]dipus deserve thy care. --Pope. [1913 Webster]

If thou be the Son of God, command that these stones be made bread. --Matt. iv. 3. [1913 Webster]

2. Whether; -- in dependent questions. [1913 Webster]

Uncertain if by augury or chance. --Dryden. [1913 Webster]

She doubts if two and two make four. --Prior. [1913 Webster]

{As if}, {But if}. See under {As}, {But}. [1913 Webster]