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.
An alkaline is any substance with a pH rating lower than 7; that is, any substance with fewer hydrogen ions than pure water. This is opposed to an acid, which is any substance with more hydrogen ions than water. The further the pH is from 7 the more of an acid or alkaline the substance is, depending on which way you're going.