Definition of "geodesic"

(geometry) The shortest curve between two points on a specific surface.  examples

(spherical geometry) A segment of a great circle.  examples

(mathematics, sciences) A course allowing the parallel-transport of vectors along a course that causes tangent vectors to remain tangent vectors throughout that course (a straight curve, a line that is straight).  examples

Of or relating to geodesy.  examples

Of or relating to a geodesic dome.  examples