air

Definition

The substance constituting Earth's atmosphere: a gaseous mixture of nitrogen, oxygen, and various trace gases.

Etymology

From Middle English aire, from Old French air, from Latin āēr, from Ancient Greek ἀήρ (aḗr). Displaced native Old English lyft. More at lift, loft.

Example Sentences

• "This drill runs on compressed air."
• "As you ascend, the air gets thinner."
• "I'm going outside to get some air."

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