1. in a manner not affected by or related to tides; without tidal influence
Usage: technical; chiefly used in hydrology, oceanography, and environmental science

Examples

• The river flows nontidally in its upper reaches, far from the ocean's influence.
• Nontidally influenced freshwater systems have different ecological characteristics than estuaries.
• The lake level changes nontidally, responding only to rainfall and evaporation.
• Researchers studied nontidally driven currents in the inland waterway.