A cylindrical container, usually made of glass or pottery, with a wide mouth and a lid, used for storing food, liquids, or other substances. She filled the jar with homemade strawberry jam.
The amount that a jar can hold. He drank a whole jar of lemonade in one sitting.
A jolt or shock, especially a physical one. The sudden stop gave him a jar that nearly knocked him off his feet.
A harsh, grating, or discordant sound. The jar of the screeching brakes made everyone cringe.