Lockage
Pronunciation : Lock"age
Part of Speech : n.
Definition : 1. Materials for locks in a canal, or the works forming a lock or locks.
2. Toll paid for passing the locks of a canal.
3. Amount of elevation and descent made by the locks of a canal. The entire lock will be about fifty feet. De Witt Clinton.
Source : Webster's Unabridged Dictionary, 1913