Definitions

1. adjective

Having or involving one; singular.

“The unary operation of negation changes the sign of a number.”

2. noun

A quantity or unit of one.

“The unary digit in the decimal system is one.”

3. noun

A monadic operator or function.

“In some programming languages, the unary minus operator is used to negate a number.”

4. adverb

Used to describe a single operation or step.

“The unary algorithm solves the problem in a single step.”