1. makes or becomes less dense; thins out
Usage: third person singular present tense of ‘rarefy’
2. makes or becomes more refined or elevated
Usage: formal; often used metaphorically

Examples

• The air rarefies as you climb higher up the mountain.
• Heat rarefies the gas in the balloon, causing it to rise.
• The atmosphere rarefies at high altitudes.
• His writing style rarefies complex ideas into simple prose.
• The artist’s technique rarefies raw emotion into pure beauty.
• Distance rarefies the sound of the approaching train.