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septic tank

noun

: a tank in which the solid matter of continuously flowing sewage is disintegrated by bacteria

Examples of septic tank in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Contaminated Water Recreational or drinking water gets contaminated when septic tanks leak into wells, when an infected person vomits or defecates in the water, or when wastewater isn’t treated properly to decontaminate it. Emily Kay Votruba, EverydayHealth.com, 2 Dec. 2025 The children who died there were buried in secret, without proper burial records, in what was once a septic tank. Jade Wilson, The Dial, 21 Oct. 2025 Nitrate forms when oxygen combines with nitrogen-rich sources like fertilizer, manure or waste from septic tanks. Laura Schulte, jsonline.com, 22 Sep. 2025 This spring, a federal appeals court agreed the Florida Department of Environmental Protection had a duty to do better, blocking new septic tanks and requiring the agency to launch a supplemental feeding program for manatees. Lois Parshley, The Atlantic, 25 Aug. 2025 See All Example Sentences for septic tank

Word History

First Known Use

1896, in the meaning defined above

Time Traveler
The first known use of septic tank was in 1896

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Cite this Entry

“Septic tank.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/septic%20tank. Accessed 5 Dec. 2025.

Kids Definition

septic tank

noun
: a tank in which solid sewage is broken down by bacteria

More from Merriam-Webster on septic tank

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