from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Any of various chiefly Old World birds of the family Motacillidae, having a slender body with a long tail that constantly wags.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any of various small passerine birds of the family Motacillidae, of the Old World, notable for their long tails.
from the GNU version of the Collaborative International Dictionary of English
- n. Any one of many species of Old World singing birds belonging to Motacilla and several allied genera of the family Motacillidæ. They have the habit of constantly jerking their long tails up and down, whence the name.
from The Century Dictionary and Cyclopedia
- n. Any bird of the family Motacillidæ (which see): so called from the continual wagging motion of the tail.
- n. Some Similar bird. In the United States the name is frequently given to two birds of the genus Seiurus, the common water-thrush and the large-billed water-thrush, S. nævius and S. motacilla, members of the family Mniotiltidæ, or American warblers. See cut under Seiurus.
- n. A term of familiarity or contempt.
- n. A pert person.
- To flutter; move the wings and tail like a wagtail.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. Old World bird having a very long tail that jerks up and down as it walks
wag + tail (Wiktionary)