a. Relating to a fornix.

v. i. [ L. fornicatus, p. p. of fornicari to fornicate, fr. fornix, -icis, a vault, a brothel in an underground vault. ] To commit fornication; to have unlawful sexual intercourse. [ 1913 Webster ]

{ , a. [ L. fornicatus, fr. fornix, -icis, an arch, vault. ] 1. Vaulted like an oven or furnace; arched. [ 1913 Webster ]

2. (Bot.) Arching over; overarched. Gray. [ 1913 Webster ]

n. [ F. fornication, L. fornicatio. ] 1. Unlawful sexual intercourse on the part of an unmarried person; the act of such illicit sexual intercourse between a man and a woman as does not by law amount to adultery. [ 1913 Webster ]

☞ In England, the offense, though cognizable in the ecclesiastical courts, was not at common law subject to secular prosecution. In the United States it is indictable in some States at common law, in others only by statute. Whartyon. [ 1913 Webster ]

2. (Script.) (a) Adultery. (b) Incest. (c) Idolatry. [ 1913 Webster ]

n. [ F. fornicateur, OF. fornicator, from L. fornicator. ] An unmarried person, male or female, who has criminal intercourse with the other sex; one guilty of fornication. [ 1913 Webster ]

n. [ Cf. F. fornicatrice, L. fornicatrix. ] A woman guilty of fornication. Shak. [ 1913 Webster ]

‖n.; pl. Fornices [ L., an arch. ] (Anat.) (a) An arch or fold; as, the fornix, or vault, of the cranium; the fornix, or reflection, of the conjuctiva. (b) Esp., two longitudinal bands of white nervous tissue beneath the lateral ventricles of the brain. [ 1913 Webster ]