the world > space > direction > [adjective] > bending or winding > turned back > doubled back on former direction (3)
= re-entering, adj. 1. Frequently in rentrant angle.
Forming a re-entrant angle (also figurative); of or relating to a re-entrant angle.
Of an angle: pointing inward; (of a line) forming part of such an angle; (Geometry) designating an interior angle of a polygon or other closed…