Source : Webster's Revised Unabridged Dictionary (1913)

Piles \Piles\, n. pl. [L. pila a ball. Cf. {Pill} a medicine.]
   (Med.)
   The small, troublesome tumors or swellings about the anus and
   lower part of the rectum which are technically called
   {hemorrhoids}. See {Hemorrhoids}.

   Note: [The singular {pile} is sometimes used.]

   {Blind piles}, hemorrhoids which do not bleed.

Source : WordNet®

piles
     n 1: pain caused by venous swelling at or inside the anal
          sphincter [syn: {hemorrhoid}, {haemorrhoid}]
     2: a large number or amount; "made lots of new friends"; "she
        amassed a mountain of newspapers" [syn: {tons}, {dozens},
        {heaps}, {lots}, {mountain}, {scores}, {stacks}, {loads},
        {rafts}, {slews}, {wads}, {oodles}, {gobs}, {scads}, {lashings}]