WordReference Random House Unabridged Dictionary of American English © 2025
jam-up
( jam′up′),USA pronunciation n.
- a stoppage or slowing of motion, work, or the like, due to obstruction, overloading, malfunction, or inefficiency;
jam:Your letters didn't go out yesterday because there was a jam-up in the mail room.
- noun, nominal use of verb, verbal phrase jam up 1940–45
'jam up' also found in these entries (note: many are not synonyms or translations):