drop lock
nounalso spelled drop-lock1
A kind of lock by which a short length of canal can be temporarily lowered while a boat passes under an obstruction such as a low bridge.
noun, adj — 2 senses
A kind of lock by which a short length of canal can be temporarily lowered while a boat passes under an obstruction such as a low bridge.
Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — authors: page histories for drop lock and drop-lock.