This is one of those words that demonstrates the importance of learning collocations rather than individual words.
Collocations are simply words that naturally go together in a language. You can know every word in a sentence and still miss the meaning if you translate them one by one.
Mine is a perfect example of this.
On paper, the dictionary will tell you mine means appearance, look or complexion.
But that’s not how it usually translates.
Tu as bonne mine. = You look well.
It’s a lovely way to compliment someone in French.
Have you heard this expression before?