1. to cut or divide into two equal or nearly equal parts.
2. Geom.to cut or divide into two equal parts: to bisect an angle.
3. to intersect or cross: the spot where the railroad tracks bisect the highway.
to split into two, as a road; fork: There's a charming old inn just before the road bisects.
Also called split. Philately.a portion of a stamp, usually half, used for payment of a proportionate amount of the face value of the whole stamp.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.