from The American Heritage® Dictionary of the English Language, 4th Edition
- transitive v. To train or undergo training again.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. to train again; especially, to train or study in a new subject or job
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- v. teach new skills
- v. train again
Sorry, no etymologies found.