∙ The atmospheric substance above the surface of the earth which animals breathe, formerly considered to be a single substance, one of the four basic elements of ancient philosophy and one of the five basic elements of several Eastern traditions. uncountable, historical, astrology, alchemy, sciences
∙ That substance, now understood as the mixture of gases constituting the earth's atmosphere. uncountable, physics, meteorology
∙ The apparently open space above the ground; the mass of this substance around the earth. usually with the
∙ A breeze; a gentle wind.
∙ A feeling or sense.
∙ A sense of poise, graciousness, or quality.
∙ Pretension; snobbishness; pretence that one is better than others. chiefly in the plural
∙ A song, especially a solo; an aria. music
∙ Nothing; absence of anything. informal
∙ An air conditioner or the processed air it produces. Can be a mass noun or a count noun depending on context; similar to hair.
∙ Any specific gas. obsolete, chemistry
∙ A jump in which one becomes airborne. snowboarding, skateboarding, motor sports
Verb
∙ To bring (something) into contact with the air, so as to freshen or dry it.
∙ To let fresh air into a room or a building, to ventilate.