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Definition of Septic tank
1. Noun. Large tank where solid matter or sewage is disintegrated by bacteria.
Definition of Septic tank
1. Noun. A small-scale watertight treatment system for domestic sewage in which the flow is slowed to allow sedimentation and sludge digestion by bacteria to take place. ¹
2. Noun. (Australia slang) Australian rhyming slang for yank, American. ¹
3. Noun. Royal Navy (UK) Slang for a Yank/American usually shortened to a Septic ¹
¹ Source: wiktionary.com