Definitions:
the flat area between the waist and knees of a seated person

a hanging flap on a garment or a saddle.

one circuit of a track during a race

an overlapping or projecting part

a single turn of rope, thread, or cable round a drum or reel.

(in a lapping machine) a rotating disc with a coating of fine abrasive for polishing.

overtake (a competitor in a race) to become one or more laps ahead

wrap or enfold someone or something in (something soft)

project beyond or overlap something

polish (metal, glass, or a gem) with a lapping machine

(of an animal) take up (liquid) with quick movements of the tongue

(of water) wash against (something) with a gentle rippling sound

the action or sound of water washing gently against something