sea level
noun
the horizontal plane or level corresponding to the surface of the sea at mean level between high and low tide.
Origin of sea level
First recorded in 1800–10
Words nearby sea level
sea lawyer,
sea leather,
sea legs,
sea letter,
sea lettuce,
sea level,
sea lily,
sea lion,
sea loch,
sea lord,
sea lungwort
Example sentences from the Web for sea level
British Dictionary definitions for sea level
sea level
noun
the level of the surface of the sea with respect to the land, taken to be the mean level between high and low tide, and used as a standard base for measuring heights and depths
Scientific definitions for sea level
sea level
The level of the ocean's surface. Sea level at a particular location changes regularly with the tides and irregularly due to conditions such as wind and currents. Other factors that contribute to such fluctuation include water temperature and salinity, air pressure, seasonal changes, the amount of stream runoff, and the amount of water that is stored as ice or snow.♦ The reference point used as a standard for determining terrestrial and atmospheric elevation or ocean depths is called the mean sea level and is calculated as the average of hourly tide levels measured by mechanical tide gauges over extended periods of time.