Third mast from the bow in a vessel having three or more masts; the after and shorter mast of a yawl, ketch, or dandy. Synonyms:mizen, mizenmast, mizzen.
... the United States Navy authorized to wear a square flag at the mizzenmast head will take rank with major-generals of the United ... — A Compilation of the Messages and Papers of the Presidents: Lincoln - Section 1 (of 2) of Volume 6: Abraham Lincoln • Compiled by James D. Richardson