Inspiration is a feeling of enthusiasm you get from someone or something, which gives you new and creative ideas.

If you describe someone or something good as an inspiration, you mean that they make you or other people want to do or achieve something.

If something or someone is the inspiration for a particular book, work of art, or action, they are the source of the ideas in it or act as a model for it.

If you suddenly have an inspiration, you suddenly think of an idea of what to do or say.