From The Collaborative International Dictionary of English v.0.48:
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.
[1913 Webster]
To lap his head on lady's breast. --Praed.
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2. To cut or polish with a lap, as glass, gems, cutlery, etc.
See 1st Lap, 10.
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From The Collaborative International Dictionary of English v.0.48:
Lapping \Lap"ping\, n.
A kind of machine blanket or wrapping material used by calico
printers. --Ure.
[1913 Webster]
Lapping engine, Lapping machine (Textile Manuf.), A
machine for forming fiber info a lap. See its Lap, 9.
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