1. light. ning \'li-t -nin\ n [ME, fr. gerund of lightenen to lighten] 1: the flashing of light produced by a discharge of atmospheric electricity from one cloud to another or from a cloud to the earth; also : the discharge itself 2: a sudden stroke of fortune
2. lightning aj : moving with or having the speed and suddenness of lightning
3. lightning vi or light. ninged; or lightning : to discharge a flash of lightning
HTTP webster interface by bsy@cs.cmu.edu