log-jam DCHP-1 (pre-1967)
1a n. — Lumbering
a massing together of logs, as in a river drive, as a result of some obstruction to their forward progress.
See also: jam ((n.)) (def. 2)
1b n. — Figurative use.
2 n. — North
a protective framework of logs intended to keep ice from damaging a ship's hull.