What dreamers remember is almost always the surface: whether it held a reflection, whether anything moved beneath it, whether the far bank could be seen at all.
What people remember from a lake dream is almost always the surface. Whether it lay flat enough to hold a reflection, whether something moved beneath it, whether the far bank was visible. Standing water has been read for centuries as the state of the feelings, and unlike a river or the open sea a lake is enclosed, which is why the tradition treats it as the inner weather rather than as events arriving from outside.
Swimming in a lake and standing at the edge of one are read very differently. Entering the water is generally treated as a willingness to feel something instead of observing it, and dreamers often describe the temperature more vividly than anything else they can recall. Falling in, or being pulled under, sits closer to drowning imagery, where the reading concerns being overwhelmed and makes no claim about water in waking life. Rowing across, in the older accounts, pictured crossing something at your own pace.
The dictionary meaning is a starting point and not much more than that. Somebody who spent every childhood summer on the same shoreline arrives at this image already carrying it, and a person who nearly drowned in one will recognise nothing at all in the calmer version. Ordinary triggers count too: a hot week, a holiday being planned, a photograph seen the evening before. The dream describes a mood rather than forecasting an event, and the mood is yours before it belongs to the symbol.


