adjective

 

interesting special and interesting because of not being the same as others

Her essay was full of original ideas.

 

first existing since the beginning, or being the earliest form of something

His original plan was to stay for a week, but he ended up staying for a month.

 

noun

 

something that is in the form in which it was first created and has not been copied or changed

The latest version of the software is much more reliable than the original.