IF

I. conjunction Etymology: Middle English, from Old English g~; akin to Old High German ibu ~ Date: before 12th century 1. in the event that, allowing that, on the assumption that, on condition that, whether , 3. — used as a function word to introduce an exclamation expressing a wish even though ; although perhaps , and perhaps not even , II. noun Date: 1513 condition , stipulation , supposition