What is the meaning of Jester?

One who jests, jokes or teases.

A person in colourful garb and fool's cap who amused a medieval and early modern royal or noble court.

Any of various nymphalid butterflies of the Southeast Asian genus Symbrenthia.

To act in a foolish or clownish way for the purpose of entertainment or attracting attention.

yeast

indefinite plural of jest

yeast

Source: wiktionary.org