head gate is a noun meaning "regulator consisting of a valve or gate that controls the rate of water flow through a sluice". It carries 2 recorded senses.
regulator consisting of a valve or gate that controls the rate of water flow through a sluice
a gate upstream from a lock or canal that is used to control the flow of water at the upper end
Definitions, synonyms and semantic relations for head gate come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.