on air is an adverb meaning "very happily". It carries one recorded sense.
very happily
“we were floating on air at the news”
Definitions, synonyms and semantic relations for on air come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.
147,478 entries in AltF Lexicon, 83,117 of them with their syllables marked.
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