A pipe or system of pipes used to remove human waste and to provide drainage.
"The local sewer was praised for her precise stitching on every garment she created."
A servant attending at a meal who is responsible for seating arrangements, serving dishes, etc.
One who sews.
In plain English: A sewer is an underground pipe that carries away dirty water and waste from homes to be treated elsewhere.
"The city is working to repair the damaged sewer that was causing flooding in the streets."
Usage: Use "sewer" as a noun to refer specifically to the underground pipe system that removes wastewater, not the person who serves food at a table. This term is often confused with "servant," but it exclusively describes infrastructure for drainage and waste removal in modern usage.
To provide (a place) with a system of sewers.
"The city council voted to sewer the newly developed residential district."
In plain English: To sewer something means to join pieces of fabric together by stitching them with thread and a needle.
"The old pipe began to sewer during yesterday's heavy rainstorm."
The word sewer comes from the Old French term sewiere, which originally referred to an overflow channel used in fishponds. It entered English via Anglo-Norman and Middle English with this specific meaning of a water course designed to drain excess water.