Longman Dictionary of Contemporary English homepage

bolt-on

adjective
     
bolt-on especially British English

bolt-on part/component/extra

something that is connected to the outside of a machine after it has been made, and is then part of the machine

Dictionary pictures of the day
Do you know what each of these is called?
What is the word for picture 1? What is the word for picture 2? What is the word for picture 3? What is the word for picture 4?
Click on any of the pictures above to find out what it is called.

Explore our topic dictionary