[1] : The Collaborative International Dictionary of English v.0.48

gap \gap\ ga^p, n. oe. gap; cf. icel. gap an empty space,
   sw. gap mouth, breach, abyss, dan. gab mouth, opening, as.
   geap expanse; as adj., wide, spacious. see gape.
   1. an opening in anything made by breaking or parting; as, a
      gap in a fence; an opening for a passage or entrance; an
      opening which implies a breach or defect; a vacant space
      or time; a hiatus; a mountain pass.
      1913 webster

            miseries ensued by the opening of that gap.
                                                  --knolles.
      1913 webster

            it would make a great gap in your own honor. --shak.
      1913 webster

   2. a"eronautics the vertical distance between two
      superposed surfaces, esp. in a biplane.
      webster 1913 suppl.

   gap lathe mach., a turning lathe with a deep notch in the
      bed to admit of turning a short object of large diameter.
      

   to stand in the gap, to expose one's self for the
      protection of something; to make defense against any
      assailing danger; to take the place of a fallen defender
      or supporter.

   to stop a gap, to secure a weak point; to repair a defect.
      1913 webster
see also:
gape gap lathe to stand in the gap to stop a gap 

Gap >> G Words
Gap, definition of term: Gap
gap_pag1.html

Jacksons Gap >> J Words
Jacksons Gap, definition of term: Jacksons Gap
jacksons+gap_pag1.html

Big Stone Gap >> B Words
Big Stone Gap, definition of term: Big Stone Gap
big+stone+gap_pag1.html