What is Fontenelle?

Fontenelle definition and meaning on Dictionary terms:
a silly or stupid person; a person who lacks judgment or sense.
a professional jester, formerly kept by a person of royal or noble rank for amusement: the court fool.
a person who has been tricked or deceived into appearing or acting silly or stupid: to make a fool of someone.

an ardent enthusiast who cannot resist an opportunity to indulge an enthusiasm (usually preceded by a present participle): He’s just a dancing fool.
a weak-minded or idiotic person.

verb (used with object)
to trick, deceive, or impose on: They tried to fool him.

verb (used without object)
to act like a fool; joke; play.
to jest; pretend; make believe: I was only fooling.

Verb Phrases
fool around, to putter aimlessly; waste time: She fooled around all through school. to philander or flirt. to be sexually promiscuous, especially to engage in adultery.

fool away, to spend foolishly, as time or money; squander: to fool away the entire afternoon.

fool with, to handle or play with idly or carelessly: to be hurt while fooling with a loaded gun; to fool with someone’s affections.