septic

Short definition from Wiktionary

Adjective

1. 1
   Of or pertaining to sepsis.
2. 2
   Causing sepsis or putrefaction.
3. 3
   Of or pertaining to sewage or the disposal of sewage.
4. 4
   Of the seventh degree or order.

Noun

1. 1
   A substance that causes sepsis or putrefaction.
2. 2
   A person who has sepsis.
3. 3
   A septic tank; a system for the disposal of sewage into a septic tank, a septic system.
4. 4
   A mathematical object (function, curve, surface, etc.) of degree seven.
5. 5
   An American, a Yank.
6. 6
   Alternative form of septic; an American.