An option may refer to any of the following:
1. An option is a term used to describe a choice presented to a user. For example, when closing a program, you may be prompted to save any open files that have unsaved changes. Clicking "Yes" would save the file, then close the program; clicking "No" would close the program, without saving the files, and your changes would be discarded.
3. Option is a short way of saying Option key.