n. (Carp.) A flaring tenon, or tongue (shaped like a bird's tail spread), and a mortise, or socket, into which it fits tightly, making an interlocking joint between two pieces which resists pulling a part in all directions except one. [ 1913 Webster ]

Dovetail molding (Arch.), a molding of any convex section arranged in a sort of zigzag, like a series of dovetails. --
Dovetail saw (Carp.), a saw used in dovetailing. [ 1913 Webster ]

v. t. [ imp. & p. p. Dovetailed p. pr. & vb. n. Dovetailing. ] 1. (Carp.) (a) To cut to a dovetail. (b) To join by means of dovetails. [ 1913 Webster ]

2. To fit in or connect strongly, skillfully, or nicely; to fit ingeniously or complexly. [ 1913 Webster ]

He put together a piece of joinery so crossly indented and whimsically dovetailed . . . that it was indeed a very curious show. Burke. [ 1913 Webster ]