Dictionary
bi'nary sys"tem
1. a system involving only two elements, as 0 and 1 or yes and no.
2. Math.a system of counting or measurement whose units are powers of two. Cf.
binary (def. 2a).
3. Astron.See
binary star. Also called
dyadic system (for defs. 1, 2).Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.