Definitions

1. verb

to make or become less dense; to become drier

“The heat caused the air to rarefy, making it easier to breathe.”

2. verb

to make less thick or dense, especially the blood

“The high altitude can cause the blood to rarefy, leading to altitude sickness.”

3. verb

to make less common or frequent

“The new policy has a tendency to rarefy the occurrence of such incidents.”

4. noun

a state or process of becoming less dense or thick

“The rarefaction of the atmosphere allowed the hot air balloon to rise.”

5. noun

a decrease in density or thickness

“The rarefaction of the blood caused the swimmer to experience fatigue.”