Meaning of AIR in English
( n. )
A musical idea, or motive, rhythmically developed in consecutive single tones, so as to form a symmetrical and balanced whole, which may be sung by a single voice to the stanzas of a hymn or song, or even to plain prose, or played upon an instrument; a melody; a tune; an aria.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012