Why are some of Mongolia’s lakes called 'seas'? Here’s the likely reason

Mongolia's landlocked geography might seem at odds with its large lakes often called "sea." This naming stems from the Mongolian word 'dalai,' historically signifying a vast expanse of water, not just oceans. This broader meaning explains why prominent lakes like Khuvsgul are also referred to as "seas."

Raccontata daeconomictimes.indiatimes.com