1. back water - Noun
2. back water - Verb
back water (plural back waters)
Alternative spelling of backwater
back water (third-person singular simple present backs water, present participle backing water, simple past and past participle backed water)
(nautical) To reverse the action of the oars, paddles, or propeller, so as to force the boat or ship backward.
Alternative form of backwater: the water held back by a dam or other obstruction
Alternative form of backwater: water used in the papermaking process. Recycled to reduce usage of fresh water, and usually containing residual amounts of chemicals and fibres.
Source: en.wiktionary.orgback-water