a glass jar with a wide mouth and an airtight screw top, much used in home canning.
Origin of Mason jar
1880–85, Americanism; named after John L. Mason, 19th-century American who patented it in 1858
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
US an airtight glass jar for preserving food
Word Origin for mason jar
C20: named after its US inventor, John L. Mason (1832–1902)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
1885, named for John Latin Mason of New York, who patented it in 1858.
Online Etymology Dictionary, © 2010 Douglas Harper