The Collaborative International Dictionary of English v.0.48:

Lap \Lap\, v. t. [OE. lappen to fold (see Lap, n.); cf. also
   OE. wlappen, perh. another form of wrappen, E, wrap.]
   1. To fold; to bend and lay over or on something; as, to lap
      a piece of cloth.
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   2. To wrap or wind around something.
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            About the paper . . . I lapped several times a
            slender thread of very black silk.    --Sir I.
                                                  Newton.
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   3. To infold; to hold as in one's lap; to cherish.
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            Her garment spreads, and laps him in the folds.
                                                  --Dryden.
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   4. To lay or place over anything so as to partly or wholly
      cover it; as, to lap one shingle over another; to lay
      together one partly over another; as, to lap
      weather-boards; also, to be partly over, or by the side of
      (something); as, the hinder boat lapped the foremost one.
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   5. (Carding & Spinning) To lay together one over another, as
      fleeces or slivers for further working.
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   To lap boards, shingles, etc., to lay one partly over
      another.

   To lap timbers, to unite them in such a way as to preserve
      the same breadth and depth throughout, as by scarfing.
      --Weale.
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