must (auxiliary verb, noun) LISTEN
If you must do something, it means that you have to do it, because it is a rule.
- All employees must wear their uniform.
If someone tells you that you must do something, it can also mean that you should do it.
- You must visit the Sagrada Familia when you’re in Barcelona.
We can use must when we are very sure that something is true.
- She runs 15km every Saturday. She must be very fit!
If something is a must, it means that it is important for you to have it.
- Thick pants are a must when you go skiing.
In pop culture
Do you know the song “It Must Be Love” by Madness? It’s about a man who didn’t know before that he was in love. When he sings, “It must be love,” he means that now he’s very sure that he’s in love. Listen for these words in the song: “It must be love, love, love. Nothing more, nothing less, love is the best.”
There are other meanings of must.