What is the meaning of the word "Rarefied"?

• The required answer - Elevated in nature or character.

• Rarefied (adjective)
English Meaning: Not ordinary, especially because of being related to wealth, high social position, art, or literature.
Bangla Meaning: বিরল/ তনু বা বিশুদ্ধ বা পরিশুদ্ধ।

Example Sentence:
1. She moves in rarefied circles.
2. It's difficult to breathe in the rarefied air near the mountain's peak.

Source:
1. Cambridge Dictionary.
2. Accessible Dictionary by Bangla Academy.