tide lock

noun

Definition of tide lock

: a lock situated between an enclosed basin or a canal and the tidewater of a harbor or river when they are on different levels so that craft can pass either way at all times of the tide

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“Tide lock.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tide%20lock. Accessed 12 Aug. 2020.

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