Mortise \Mor"tise\, v. t. [imp. & p. p. Mortised; p. pr. & vb. n. Mortising.]

1. To cut or make a mortisein.

2. To join or fasten by a tenon and mortise; as, to mortise a beam into a post, or a joist into a girder.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Mortise \Mor"tise\, n. [F. mortaise; cf. Sp. mortaja, Ar. murtazz fixed, or W. mortais, Ir. mortis, moirtis, Gael. moirteis.]

A cavity cut into a piece of timber, or other material, to receive something (as the end of another piece) made to fit it, and called a tenon.

Mortise and tenon (Carp.), made with a mortise and tenon; joined or united by means of a mortise and tenon; -- used adjectively.

Mortise joint, a joint made by a mortise and tenon.

Mortise lock. See under Lock.

Mortise wheel, a cast-iron wheel, with wooden clogs inserted in mortises on its face or edge; -- also called mortise gear, and core gear.

Source: Webster's Revised Unabridged Dictionary (1913)