2. An edge; a border; a hem, as of cloth. Chaucer.

If he cuts off but a lap of truth's garment, his heart smites him.

Fuller.

3. The part of the clothing that lies on the knees or thighs when one

sits down; that part of the person thus covered; figuratively, a place

of rearing and fostering; as, to be reared in the lap of luxury.

Men expect that happiness should drop into their laps.

Tillotson.

4. That part of any substance or fixture which extends over, or lies

upon, or by the side of, a part of another; as, the lap of a board;

also, the measure of such extension over or upon another thing.

The lap of shingles or slates in roofing is the distance one course

extends over the second course below, the distance over the course

immediately below being called the cover.

5. (Steam Engine) The amount by which a slide valve at its half stroke

overlaps a port in the seat, being equal to the distance the valve must

move from its mid stroke position in order to begin to open the port.

Used alone, lap refers to outside lap. See Outside lap (below).

6. The state or condition of being in part extended over or by the side

of something else; or the extent of the overlapping; as, the second

boat got a lap of half its length on the leader.

7. One circuit around a race track, esp. when the distance is a small

fraction of a mile; as, to run twenty laps; to win by three laps. See

Lap, to fold, 2.

8. In card playing and other games, the points won in excess of the

number necessary to complete a game; -- so called when they are counted

in the score of the following game.

9. (Cotton Manuf.) A sheet, layer, or bat, of cotton fiber prepared for

the carding machine.

10. (Mach.) A piece of brass, lead, or other soft metal, used to hold a

cutting or polishing powder in cutting glass, gems, and the like, or in

polishing cutlery, etc. It is usually in the form of wheel or disk,

which revolves on a vertical axis.

Lap joint, a joint made by one layer, part, or piece, overlapping

another, as in the scarfing of timbers. -- Lap weld, a lap joint made

by welding together overlapping edges or ends. -- Inside lap (Steam

Engine), lap of the valve with respect to the exhaust port. -- Outside

lap, lap with respect to the admission, or steam, port.

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.

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.

The Gutenberg Webster's Unabridged Dictionary: Section I, J, K, and L · 第 1646 / 2341 题