A piece of land that projects into a body of water and is connected with the mainland by an isthmus.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "peninsula" in a sentence
"Johnson is author of "Barns of Old Mission Peninsula and Their Stories," which earned a 2006 Merit Award from the Historical Society of Michigan for its photos and stories about 104 old barns on the peninsula."
"Perhaps the North Korean peninsula is an example, but otherwise its much smaller than in recent history."
"The peninsula is a Mexican jewel that is easily enjoyed by anyone with an RV or a tent and a sense of adventure."