/ Dictionary / Index C centerline: Meaning and Definition of Find definitions for: cen•ter•line Pronunciation: (sen'tur-līn"), [key] — n. any line that bisects a plane figure: the centerline of a building plan. a line along the center of a road or highway dividing it into separate sections for traffic moving in opposite directions. the perpendicular bisector of the line connecting two radio transmitters. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: centerline (Thesaurus) center jump center of curvature Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language