Definition of sepia

• n. - The common European cuttlefish.
• n. - A genus comprising the common cuttlefish and numerous similar species. See Illustr. under Cuttlefish.
• n. - A pigment prepared from the ink, or black secretion, of the sepia, or cuttlefish. Treated with caustic potash, it has a rich brown color; and this mixed with a red forms Roman sepia. Cf. India ink, under India.
• a. - Of a dark brown color, with a little red in its composition; also, made of, or done in, sepia.