What is the meaning of Alkali?

One of a class of caustic bases, such as soda, soda ash, caustic soda, potash, ammonia, and lithia, whose distinguishing characteristics are dissolving in alcohol and water, uniting with oils and fats to form soap, neutralizing and forming salts with acids, turning to brown several vegetable yellows, and changing reddened litmus to blue.

Soluble mineral matter, other than common salt, contained in soils of natural waters.

alkali

an alkali

alkali

Synonym of emäs.

Alternative form of alƙali

alkali, a group of bases from alkali metal group.

base, any of a class of generally water-soluble compounds, having bitter taste, that turn red litmus blue, and react with acids to form salts.

an alkali

an alkali

Obsolete form of alkalia.

alkali

an alkali

This term needs a translation to English. Please help out and add a translation, then remove the text {{rfdef}}.

Source: wiktionary.org