binary

adjective1 of 2

having two parts; using only 2 numbers, 1 and 0

• “The natural world challenges our binary classifications.”Tatoeba
• “Computers use the binary number system.”Tatoeba

Sentences from Tatoeba show real usage. A word can have several meanings, so a sentence may use another one.

noun2 of 2

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