afterthought – something that is thought of or added later

(Pronounced af-tuh-thort)

To remember the definition of the word afterthought, use the following mnemonic:

This word is simple to understand if broken up and reversed:

Afterthought = thought after

Think of it as an idea that was thought of after the plan was supposedly complete, and not originally intended. 

Examples of afterthought in a sentence

They only invited Robert as an afterthought.

The film was made first and the music was added as an afterthought.

It was an afterthought, but the idea turned out to be a ground breaking invention.