Lake turnover occurs when the layers of water with noted temperature differences begin to mix together and the water and debris that has been sitting at the bottom of the lake begins to mix with the layers of water above it.
Definition of cautious. : careful about avoiding danger or risk cautious investors cautious optimism.
The definition of cautious is being aware, being careful or being alert to danger. An example of cautious is a person who always makes a pro/con list before making any decision to identify all possible problems that could come up. An example of cautious is a decision undertaken only after great deliberation and with some lingering fear.