(pīl) noun
1. A quantity of anything gathered or thrown together in one place; a heap.
2. Electr. Any of various devices for generating an electric current by means of super-imposed plates of different metals in contact with a suitable liquid: a galvanic pile, voltaic pile.
3. A funeral pyre.
4. A large accumulation or number of something.
5. A massive building or group of buildings.
6. A pyramid.
7. A great quantity, especially of money; a fortune.
8. Physics A reactor.
—to make one's pile To amass a fortune.
—v. piled, pil·ing v.t.
1. To make a heap or pile of: often with up.
2. To cover or burden with a pile or piles: to pile a plate with food.
—v.i.
3. To form a heap or pile.
4. To proceed or go in a confused mass: with in, on, off, out, etc. See synonyms under HEAP.
—to pile up
1. To accumulate.
2. Colloq. To reduce or become reduced to a pile or wreck. [<OF <L pila a pillar, pier]

(pīl) noun
1. A heavy timber pointed at one end, forced into the earth to form a foundation; a spile.
2. An arrowhead.
3. Formerly, a pointed stake.
4. Obs. A javelin.
—v.t. piled, pil·ing
1. To drive piles into, as for a foundation.
2. To furnish or strengthen with piles. [OE pil a dart, pointed stake <L pilum a heavy javelin]

(pīl) noun
1. Hair collectively; fur.
2. The manner in which hair is laid or set.
3. A fiber, as of cotton.
4. The cut or uncut loops which make the surface of certain fabrics, as velvets, plushes, corduroys, etc. [<L pilus hair]
—piled adjective
CROSS–SECTION OF PILE WEAVE