the world > the earth > water > body of water > channel of water > [noun] > navigable waterway > canal > lock or chamber > series of locks (3)
A series of locks on a canal or river; locks collectively.
A series of locks on a canal, rising like steps one above the other.
a series of consecutive canal locks arranged so that the upper gate of one lock serves as the lower gate of the next; cf. flight, n.1 7b.