Speed Skiers. Speed skiers, who dress in aerodynamic apparel and ski straight down the mountain sans turning, go as fast as 120 - 150 miles per hour. World record holders, like Italy's Simone Origone, have reached 156.2 miles per hour.
Wiktionary(0.00 / 0 votes)Rate this definition: 1  alkaline(Noun) An alkaline battery. 2  alkaline(Adjective) Of, or relating to an alkali, one of a class of caustic bases. 3  alkaline(Adjective) Having a pH greater than  7.
Definition of alkali. plural. alkalies. or. alkalis. 1 : a soluble salt obtained from the ashes of plants and consisting largely of potassium or sodium carbonate; broadly : a substance (such as a hydroxide or carbonate of an alkali metal) having marked basic properties â compare base 7a. 2 : alkali metal.