Definify.com
Webster 1913 Edition
Peninsula
Pen-in′su-la
,Noun.
A portion of land nearly surrounded by water, and connected with a larger body by a neck, or isthmus.
Webster 1828 Edition
Peninsula
PENIN'SULA
,Noun.
1.
A portion of land, connected with a continent by a narrow neck or isthmus, but nearly surrounded with water. Thus Boston stands on a peninsula.2.
A large extent of country joining the main land by a part narrower than the tract itself. Thus Spain and Portugal are said to be situated on a peninsula.