WordReference Random House Unabridged Dictionary of American English © 2026traf′fic jam′, - jam1 (def. 16).
traf′fic-jammed′, adj.
Collins Concise English Dictionary © HarperCollins Publishers::
traffic jam n - a number of vehicles so obstructed that they can scarcely move
'traffic jam' also found in these entries (note: many are not synonyms or translations):