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: Webster's Revised Unabridged Dictionary (1913)