(Usually with distinguishing word) any of various swifts with black plumage; especially (more fully "American black swift") Cypseloides niger, of North and Central America.
Origin
Early 19th century.
Definition of black swift in US English:
black swift
noun
(Usually with distinguishing word) any of various swifts with black plumage; especially (more fully "American black swift") Cypseloides niger, of North and Central America.