It is a noun that means to laugh because you are amused or pleased by something.

How do you pronounce it?

or

Where does it come from?

We can thank Lewis Carroll for this delightful word. It is a combination of two words: chuckle and snort. Lewis Carroll used the term chortle in his book, Through the Looking-Glass (1871).

How do you use it?

Whenever the girl told a joke, her uncle let out a huge chortle.