from The Century Dictionary and Cyclopedia
- n. An inclosure with gates at each end, forming a connection between the upper and lower levels of a canal, enabling boats to pass from one to the other.
- n. See lock. In the accompanying cut e represents the inclosure technically called a lock-chamber. A boat having entered this chamber from g′ , the gates at g′ are closed and those at g opened; the Water in e, being thus reinforced with part of the water beyond g, rises to the same level with it, and the boat proceeds.
Sorry, no etymologies found.