tree swift is a noun meaning "birds of southeast Asia and East Indies differing from true swifts in having upright crests and nesting in trees". It carries one recorded sense.
birds of southeast Asia and East Indies differing from true swifts in having upright crests and nesting in trees
Definitions, synonyms and semantic relations for tree swift come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.