A cap of a type formerly worn in Spain for hunting, having a spherical crown and (frequently fur-lined) flaps able to be drawn down to protect the ears and neck.
Common especially in the 17th century.
Early 17th century; earliest use found in Randle Cotgrave (fl. 1587–?1630), lexicographer. From Spanish montera montera, with alteration of the ending, probably after earlier loans of Spanish words in -ero.