n. (also mizzen) Naut. (in full mizen-sail) the lowest fore-and-aft sail of a fully rigged ship's mizen-mast. mizen-mast the mast next aft of the mainmast. mizen yard that on which the mizen is extended.
[ ME f. F misaine f. It. mezzana mizen-sail, fem. of mezzano middle: see MEZZANINE ]