Source : Webster's Revised Unabridged Dictionary (1913)

Lap \Lap\, v. t. [imp. & p. p. {Lapped}; p. pr. & vb. n.
   {Lapping}.]
   1. To rest or recline in a lap, or as in a lap.

            To lap his head on lady's breast.     --Praed.

   2. To cut or polish with a lap, as glass, gems, cutlery, etc.
      See 1st {Lap}, 10.

Lapping \Lap"ping\, n.
   A kind of machine blanket or wrapping material used by calico
   printers. --Ure.

   {Lapping engine}, {Lapping machine} (Textile Manuf.), A
      machine for forming fiber info a lap. See its {Lap}, 9.

Source : WordNet®

lap
     n 1: the upper side of the thighs of a seated person; "he picked
          up the little girl and plopped her down in his lap"
     2: an area of control or responsibility; "the job fell right in
        my lap"
     3: the part of a piece of clothing that covers the thighs; "his
        lap was covered with food stains" [syn: {lap covering}]
     4: a flap that lies over another part; "the lap of the shingles
        should be at least ten inches" [syn: {overlap}]
     5: movement once around a course; "he drove an extra lap just
        for insurance" [syn: {circle}, {circuit}]
     6: touching with the tongue; "the dog's laps were warm and wet"
        [syn: {lick}]
     [also: {lapping}, {lapped}]

lapping
     n : covering with a design in which one element covers a part of
         another (as with tiles or shingles) [syn: {imbrication},
         {overlapping}]

lap
     v 1: lie partly over or alongside of something or of one another
     2: pass the tongue over; "the dog licked her hand" [syn: {lick}]
     3: move with or cause to move with a whistling or hissing
        sound; "The bubbles swoshed around in the glass"; "The
        curtain swooshed open" [syn: {swish}, {swosh}, {swoosh}]
     4: take up with the tongue; "The cat lapped up the milk"; "the
        cub licked the milk from its mother's breast" [syn: {lap
        up}, {lick}]
     5: wash or flow against; "the waves laved the shore" [syn: {lave},
         {wash}]
     [also: {lapping}, {lapped}]

lapping
     See {lap}