If you want the dictionary definition, just double click on any word.

Experience can be used as an uncountable noun. You use it when you're talking about knowledge or skill which is obtained from doing, seeing or feeling things.

For example: Do you have any experience of working internationally?

Experiences is a plural noun, and when you use it in this form you are talking about a particular incident or incidents that have affected you.

For example: It was interesting hearing about his experiences during the war.

Experience can also be a verb. It means something that happens to you, or something you feel.

For example: Many people experience a sense of dread when they think about exams.

Thanks to Ngoc Khanh