A more thorough explanation:

Definition: Tidal is an adjective used to describe something that is affected by or has tides.

For example, a river can be considered tidal if the water level rises and falls due to the regular flow of tides. It doesn't necessarily have to be saltwater, but it must be a spot where the tide flows and reflows.

Another example of something that is tidal is the ocean. The ocean is affected by tides, which are caused by the gravitational pull of the moon and the sun. The tides cause the water level to rise and fall twice a day.

These examples illustrate the definition of tidal by showing how tides affect the water level of different bodies of water. Tidal areas are important for many reasons, including fishing, transportation, and recreation.