ar

noun

1. a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere

Similar word(s): argon

Definition categories: substance, element

2. a unit of surface area equal to 100 square meters

Similar word(s): are

Definition categories: quantity

3. a state in south central United States; one of the Confederate states during the American Civil War

Similar word(s): arkansas

Definition categories: location