Because the Caspian Sea is an inland water body, it can be classified as a sea or lake. It is an endorheic basin (drainage basin without an outflow) …
Caspian Sea is actually the world's biggest lake and not a sea
The Caspian Sea is the world’s largest inland water body enclosed or bordered by land on all sides. Going by the definition of a sea, the Caspian Sea is a lake and not a sea as it is an enclosed water body without any direct outlet to the ocean. However, 5.5 million years ago, it was part of the ancient Parathethys Sea and got landlocked due to tectonic uplift and sea-level fall. Hence, the seafloor of the Caspian Sea is composed of oceanic basalt and not continental granite.

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According to the definition of NOAA, US, a sea is partially enclosed by land and is smaller than the ocean. It usually refers to the waters in the …
Almost anybody has an idea of what a sea or a lake is. However, the confusion sets in when some water bodies referred to as seas are also called …
Lakes are bodies of water surrounded by land except for outlets or inlets in the form of rivers or streams that drain or feed the lakes respectively. …
Other major bodies of water
The Caspian Sea is located in the middle of the Eurasian supercontinent, between the Caucasus Mountains and the Central Asian Steppe region. The sea …
5. Description The Caspian Sea, the world’s largest enclosed, inland body of water, with an area of 386,400 square kilometers and a salinity of 1.2% …
A lake is a large water body that is surrounded by land. Lakes are inland, i.e., not part of the world's oceans. Most lakes are situated in places …