key
US /ki/
・UK /ki:/
A1
noun
- Answers to exercises, as at the back of a book
- A button on a keyboard.
- Something you use to open a lock or start a car
- A small piece of shaped metal with incisions cut to fit the wards of a particular lock, which is inserted into a lock and turned to open or close it.
- Button on a computer keyboard used for typing
- List that explains symbols or abbreviations
- A set of notes based on a particular note and making up a scale.
adjective
- Important; necessary to make an action successful
- Of crucial importance.
verb
- To enter information or data into a computer
Examples
Language is the key to understanding those around you.
the key of G major