Morass \Mo*rass"\, n. [OE. marras, mareis (perh. through D. moeras), fr. F. marais, prob. from L. mare sea, in LL., any body of water; but perh. influenced by some German word. See Mere a lake, and cf. Marsh.]

A tract of soft, wet ground; a marsh; a fen.

Morass ore. (Min.) See Bog ore, under Bog.

Source: Webster's Revised Unabridged Dictionary (1913)