ˈalkələ̇n, -ˌlīn adjective
Etymology: alkali + -ine
1. : of, relating to, or having the properties of an alkali: as
a. : having an alkaline reaction : having a pH of more than 7
an alkaline soil
a strongly alkaline solution
b. : containing or involving the use of alkali
alkaline bath
alkaline fusion
— see basic 3, caustic 1
2. : of or relating to the alkali metals