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

gap \gap\, v. t.
   1. to notch, as a sword or knife.
      1913 webster

   2. to make an opening in; to breach.
      1913 webster

            their masses are gapp'd with our grape. --tennyson.
      1913 webster

[2] : 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 

[3] : WordNet (r) 2.0

gap
     n 1: a conspicuous disparity or difference as between two
          figures; "gap between income and outgo"; "the spread
          between lending and borrowing costs" syn: spread
     2: an open or empty space in or between things; "there was a
        small opening between the trees"; "the explosion made a
        gap in the wall" syn: opening
     3: a narrow opening; "he opened the window a crack" syn: crack
     4: a pass between mountain peaks syn: col
     5: an act of delaying or interrupting the continuity; "it was
        presented without commercial breaks" syn: break, interruption,
         disruption
     v : make an opening or gap in syn: breach
     also: gapping, gapped
see also:
spread opening crack col break interruption 
disruption breach gapping gapped 

[4] : Moby Thesaurus II by Grady Ward, 1.0

171 moby thesaurus words for "gap":
   abysm, abyss, aperture, arrearage, arroyo, bottom, bottom glade,
   bottoms, box canyon, breach, break, breakage, broaching, burst,
   caesura, canyon, cavity, cessation, chap, chasm, check, chimney,
   chink, chip, clearing, cleavage, cleave, cleft, cleuch, clough,
   clove, col, coulee, couloir, crack, cranny, crevasse, crevice, cut,
   cut apart, cwm, dale, defalcation, defect, deficiency, deficit,
   defile, dehisce, delay, dell, difference, dike, dingle,
   disagreement, disclosure, discontinuity, discrepancy, disparity,
   disruption, distance, distinction, ditch, divergence, division,
   donga, draw, excavation, fault, fenestra, fissure, fistula, flaw,
   flume, fontanel, foramen, fracture, furrow, gape, gash, gat, gill,
   glen, gorge, groove, grove, gulch, gulf, gully, halt, hang open,
   hiatus, hole, hollow, incise, incision, inconsistency, inlet,
   interim, intermission, interruption, interspace, interval,
   intervale, joint, kloof, lack, lacuna, laying open, leak, letup,
   lull, lunar rill, missing link, moat, need, notch, nullah,
   omission, open, opening, opening up, orifice, oscitate, outage,
   outlet, pass, passage, passageway, pause, pore, ravine, recess,
   rent, respite, rest, rift, rime, rip, rive, rupture, scale,
   scissure, seam, separation, shortage, slash, slice, slit, slot,
   space, splinter, split, stoma, stop, strath, suspension, tear,
   throwing open, trench, trough, ullage, uncorking, unstopping, vale,
   valley, void, wadi, wait, want, wantage, yawn

[5] : Virtual Entity of Relevant Acronyms (Version 1.9, June 2002)

gap
     generic access profile dect, europe
     
     

[6] : Virtual Entity of Relevant Acronyms (Version 1.9, June 2002)

gap
     generic address parameter
     
     

[7] : The Free On-line Dictionary of Computing (27 SEP 03)

gap
     
         groups algorithms and programming.
     
        a system for symbolic mathematics for computational discrete
        algebra, especially group theory, by johannes meier, alice
        niemeyer, werner nickel, and martin schonert of aachen.  gap
        was designed in 1986 and implemented 1987.  version 2.4 was
        released in 1988 and version 3.1 in 1992.
     
        sun version ftp://ftp.math.rwth-aachen.de/pub/gap.
     
        "gap 3.3 manual, m. schonert et al, lehrstuhl d math, rwth
        aachen, 1993.
     
        1995-04-12
     
     
see also:
symbolic mathematics lt;sun versiongt; 

[8] : Easton's 1897 Bible Dictionary

gap
   a rent or opening in a wall ezek. 13:5; comp. amos 4:3. the
   false prophets did not stand in the gap ezek. 22: 30, i.e.,
   they did nothing to stop the outbreak of wickedness.
   

[9] : U.S. Gazetteer (1990)

gap, pa cdp, fips 28376
  location: 39.98894 n, 76.02423 w
  population 1990: 1226 490 housing units
  area: 5.9 sq km land, 0.0 sq km water
  zip codes: 17527

[10] : U.S. Gazetteer Places (2000)

gap, pa -- u.s. census designated place in pennsylvania
   population 2000:    1611
   housing units 2000: 597
   land area 2000:     2.794488 sq. miles 7.237690 sq. km
   water area 2000:    0.000000 sq. miles 0.000000 sq. km
   total area 2000:    2.794488 sq. miles 7.237690 sq. km
   fips code:            28376
   located within:       pennsylvania pa, fips 42
   location:             39.987360 n, 76.019254 w
   zip codes 1990:     17527
   note: some zip codes may be omitted esp. for suburbs.
   headwords:
    gap, pa
    gap

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

Union Gap >> U Words
Union Gap, definition of term: Union Gap
union+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