1. relating to or affected by the rise and fall of ocean tides
2. having a flowing and ebbing movement like tides
Usage: figurative

Examples

• The tidal pool was filled with small crabs and sea anemones.
• Tidal forces from the moon cause the ocean levels to change twice daily.
• The river mouth has a tidal zone where salt and fresh water mix.
• Scientists study tidal patterns to predict the best fishing times.
• The tidal wave of support for the candidate surprised everyone.
• Tidal energy could provide a renewable source of electricity.
• The marsh floods during tidal surges and drains at low tide.