Silliness is when someone or something does something ridiculous or foolish.
We use this word often when we talk about people being silly, doing funny things on purpose. For example, if your friend decides to have a dance party in the middle of the grocery store, it might be considered silly behavior. Or, if you see a kid playing with a bubble machine indoors and making a huge mess, that could also be seen as silly. Sometimes we use this word to poke fun at ourselves too - like when we do something embarrassing or out of character.
That which is perceived as silly or frivolous.
