if and only if definition March 21, 2017 AZ Dictionary Link to this page conjunction: is the same as; implies and it is implied by; is true and false in the same cases as. Related Sources Sentence for "if and only if" 1) The sum a geometric sequence… View More Etymologically Related for "if and only if" iff View More Urban Dictionary for "if and only if" a phrase used by mathematicians and… View More How would you define if and only if? All the definitions on AZdictionary were written by people just like you. Now's your chance to add your own! Your Full Name Your definition Post Definition

## How would you define if and only if?