Definition of yest
- yest Noun Obsolete spelling of yeast
- yeast Noun An often humid, yellowish froth produced by fermenting malt worts, and used to brew beer, leaven bread, and also used in certain medicines.
- yeast Noun A type of single-celled fungus.
- yeast Noun A compressed cake or dried granules of this substance used for mixing with flour to make bread dough rise.
- yeast Noun A frothy foam.
- yeast Verb To exaggeratehttp://www.probertencyclopaedia.com/cgi-bin/res.pl?&