What is the difference between an idiom and a metaphor?

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Tags

1. #apparent
2. #expression
3. #simile
4. #people
5. #idiom
6. #meaning
7. #actually
8. #metaphor
9. #extreme
10. #immediately
11. #where
12. #between
13. #literal
14. #literally
15. #though
16. #interpretation
17. #words
18. #comparison