If — Defs

01 conj. In case that; granting, allowing, or supposing that; -- introducing a condition or supposition.

1.
In case that; granting, allowing, or supposing that; -- introducing a condition or supposition.
“Tisiphone, that oft hast heard my prayer, Assist, if Œdipus 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.

Phrases & compounds

As if — See under As, But.