1. to make or become less dense; to thin out
Usage: often used in scientific contexts
2. to make or become more refined or elevated
Usage: formal

Examples

• The air begins to rarefy at high altitudes.
• Heat will rarefy the gas in the container.
• The atmosphere rarefies as you climb the mountain.
• The artist sought to rarefy his technique through years of practice.
• Pollution can rarefy the quality of urban air.
• The professor’s lectures seemed to rarefy complex concepts into simple ideas.