<p><strong>Noun</strong></p><ul><li>A very small nectar-sipping New World bird of the family Trochilidae, characterized by the brilliant, iridescent plumage of the male, a slender bill, and narrow wings, the extremely rapid beating of which produces a humming sound. Noted for their ability to hover and to fly upward, downward, and backward in a horizontal position.</li><li>A member of the family Trochilidae.</li></ul>