[gap] n [ME, fr. ON, chasm, hole; akin to ON gapa to gape] (14c) 1 a: a break in a barrier (as a wall, hedge, or line of military defense) b: an assailable position
2. a: a mountain pass b: ravine
3: spark gap
4. a: a separation in space b: an incomplete or deficient area "a ~ in her knowledge"
5: a break in continuity: hiatus
6: a break in the vascular cylinder of a plant where a vascular trace departs from the central cylinder 7: lack of balance: disparity "the ~ between imports and exports" 8: a wide difference in character or attitude "the generation ~" 9: a problem caused by some disparity "a communication ~" "credibility ~" -- gap.py adj
gap vb gapped ; gap.ping vt (1879) 1: to make an opening in
2: to adjust the space between the electrodes of (a spark plug) ~ vi: to fall or stand open