1
: of, relating to, or causing putrefaction
2
: relating to, involving, caused by, or affected with sepsis
septic patients
3
: used for sewage treatment and disposal
a septic system
also
: of or relating to a septic system
septic effluents
Examples of septic in a Sentence
Recent Examples on the Web
Some of those businesses would separate the battery casings from the lead and provide the casing material for use in construction, landscaping, septic systems, drainage fields, and similar projects.
—
Jennifer Mayerle, CBS News, 16 Dec. 2025
Heating now comes from lower-emissions heat pumps, and the existing septic system has been replaced by an Innovative/Alternative (or IA) system designed to prevent excess nitrogen and other nutrients from entering the wastewater, which contributes to water-quality issues and harmful algae blooms.
—Hannah Walhout, Travel + Leisure, 4 Dec. 2025
New wells and septic systems would need to be installed.
—Aldo Svaldi, Denver Post, 26 Nov. 2025
But they also can be found in areas where there’s standing water, such as a sewer or septic leak, inside dirty garbage cans or rain barrels, areas where air conditioner condensate lines drain, or even in tree holes, abandoned birds nests, and condensate pans under fridges or air conditioners.
—Arricca Elin Sansone, Southern Living, 16 Nov. 2025
See All Example Sentences for septic
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Jennifer Mayerle, CBS News, 16 Dec. 2025
Heating now comes from lower-emissions heat pumps, and the existing septic system has been replaced by an Innovative/Alternative (or IA) system designed to prevent excess nitrogen and other nutrients from entering the wastewater, which contributes to water-quality issues and harmful algae blooms.
—Hannah Walhout, Travel + Leisure, 4 Dec. 2025
New wells and septic systems would need to be installed.
—Aldo Svaldi, Denver Post, 26 Nov. 2025
But they also can be found in areas where there’s standing water, such as a sewer or septic leak, inside dirty garbage cans or rain barrels, areas where air conditioner condensate lines drain, or even in tree holes, abandoned birds nests, and condensate pans under fridges or air conditioners.
—Arricca Elin Sansone, Southern Living, 16 Nov. 2025
See All Example Sentences for septic
Cite this Entry
“Septic.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/septic. Accessed 22 Dec. 2025.
Copy CitationMedical Definition
septic
adjective
sep·tic
ˈsep-tik 
1
2
: relating to, involving, caused by, or affected with sepsis
septic complications
septic arthritis
septic patients
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