- You are here:
- Home
- AZ Dictionary

*conjunction:*- is the same as; implies and it is implied by; is true and false in the same cases as.

## Related Sources

**Definition for "if and only if"**

**Sentence for "if and only if"**

**Etymologically Related for "if and only if"**

**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!