afterthought
//ˈæf.tə.θɔːt//
Noun
afterthoughtSingular
afterthoughtsPlural
1
An idea, thought, or plan that occurs to someone after an event or decision has already taken place.
The safety features were added as an afterthought.
2
Something added or considered later, often as an unimportant addition or as if it were not originally planned.
The garden was added as an afterthought when they renovated the house.