fay

n. [ OF. fei, F. foi. See Faith. ] Faith; as, by my fay. [ Obs. ] Chaucer. [ 1913 Webster ]

v. t. [ imp. & p. p. fayed p. pr. & vb. n. Faying. ] [ OE. feien, v.t. & i., AS. fēgan to join, unite; akin to OS. fōgian, D. voegen, OHG. fuogen, G. fügen, Sw. foga. See Fair, and cf. Fadge. ] (Shipbuilding) To fit; to join; to unite closely, as two pieces of wood, so as to make the surface fit together. [ 1913 Webster ]

v. i. (Shipbuilding) To lie close together; to fit; to fadge; -- often with in, into, with, or together. [ 1913 Webster ]

Faying surface, that surface of an object which comes with another object to which it is fastened; -- said of plates, angle irons, etc., that are riveted together in shipwork. [ 1913 Webster ]

n. [ So called from the island Fayal. ] (Min.) A black, greenish, or brownish mineral of the chrysolite group. It is a silicate of iron. [ 1913 Webster ]

‖n. See Faïence. [ 1913 Webster ]