Definition of jars:
(n) :
(originally) An earthenware container, either with two or no handles, for holding oil, water, wine, etc., or used for burial.
(n) :
A small, approximately cylindrical container, normally made of clay or glass, for holding fruit, preserves, etc., or for ornamental purposes.
(n) :
A container and its contents; as much as fills such a container; a jarful.
(n) :
(British, Ireland, colloquial) A pint glass
(n) :
(British, Ireland, colloquial, metonymic) A glass of beer or cider, served by the pint.
(v) :
(transitive) To preserve (food) in a jar.