from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Traveling close together with bumpers almost touching: The cars were bumper-to-bumper in the tunnel.
- adj. Moving slowly or stalled as a result of tight spacing between vehicles: bumper-to-bumper traffic.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Very crowded and slow-moving, particularly with regard to motor vehicle traffic.
from the GNU version of the Collaborative International Dictionary of English
- adj. moving slowly with little space between; -- used of road traffic.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. used of traffic
Sorry, no etymologies found.