The ground near the edge of a lake; the land adjacent to a lake.
"After hiking up the mountain, we finally reached the lakeside where the water was crystal clear and calm."
By the side of a lake.
"We decided to have our picnic at the lakeside where the water was calm and clear."
A settlement at the south end of Windermere, South Lakeland district, Cumbria, England (OS grid ref SD3787).
"The new café in Lakeside offers a perfect spot to watch the sunset over Lake Windermere."