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An
inlet is an indentation of a shoreline, usually long and narrow, such as a small bay or arm, that often leads to an enclosed body of water, such as a
sound,
bay,
lagoon, or
marsh. In sea coasts, an inlet usually refers to the actual connection between a bay and the
ocean and is often called an "entrance" or a recession in the shore of a sea, lake, or river. A certain kind of inlet created by glaciation is a
fjord, typically but not always in mountainous coastlines and also in
montane lakes.
