A thing which can have only (one or the other of) two values.

The bijective base-2 numeral system, which uses only the digits 0 and 1.

An executable computer file.

Being in a state of one of two mutually exclusive conditions such as on or off, true or false, molten or frozen, presence or absence of a signal.

“Binary states are often represented as 1 and 0 in computer science.”

Concerning logic whose subject matter concerns binary states.

Concerning numbers and calculations using the binary number system.