Galleass definition

gălē-ăs, -əs

A large, fast, heavily armed three-masted Mediterranean galley of the 1500s and 1600s.

noun

A large, three-masted vessel having sails and oars and carrying heavy guns: used in the Mediterranean in the 16th and 17th cent.

noun

(nautical, historical) A type of rowable vessel of the 16th and 17th centuries, similar to a galley but larger, and normally equipped with sails.

noun

Alternative Forms

Alternative Form of galleass - galeas

Singular:

galleass

Plural:

galleasses

Old French galeasse from Old Italian galeaza augmentative of galea galley from Old Provençal or Catalan galley

From American Heritage Dictionary of the English Language, 5th Edition