A piece of land that lengthens out into the ocean or sea and is almost completely surrounded by it: There are some people who confuse a peninsula with an island because they both have so much water around them; however, peninsulas are connected to the mainland while islands are completely encircled by water with no direct connection with it.

Part of Italy is a peninsula which looks like a boot and most peninsulas are narrow and long and they may look like an arm or a leg.