Something that restrains a flood or outpouring.

Roget 233: limit, boundary, bounds, confine, enclave, term, bourn, verge, curbstone^†, but, pale, reservation; termination, terminus; stint, frontier, precinct, marches; backwoods.    boundary line, landmark; line of demarcation, line of circumvallation^†; pillars of Hercules; Rubicon, turning point; ne plus ultra [Lat.]; sluice, floodgate.    ... show more

Roget 295: egress, exit, issue; emersion, emergence; outbreak, outburst; eruption, proruption^†; emanation; egression; evacuation; exudation, transudation; extravasation [Med.], perspiration, sweating, leakage, percolation, distillation, oozing; gush etc. (water in motion) 348; outpour, outpouring; effluence, effusion; effluxion^†, drain; dribbling etc. v.; defluxion^†; drainage; outcome, output; discharge etc. (excretion) 299.    export, expatriation; emigration, remigration^†; debouch, debouche; emunctory^†; exodus etc. (departure) 293; emigrant.    outlet, vent, spout, tap, sluice, floodgate; pore; vomitory, outgate^†, sally port; way out; mouth, door etc. (opening) 260; path etc. (way) 627; conduit etc. 350; airpipe etc. 351^†.    ... show more

Regulator consisting of a valve or gate that controls the rate of water flow through a sluice.

synonyms: head gate, penstock, sluice valve, sluicegate, water gate.

Dutch: schutdeur, sluisdeur