A cylindrical glass or earthenware vessel with a wide mouth and usually no handles.
The amount that a jar can hold.
Chiefly British A glass of beer.
tr.v.
jarred, jar·ring, jars To put into a jar.
[Middle English jarre, a liquid measure, from Old French (from Provençal jarra) and from Medieval Latin jarra, both from Arabic jarra, earthen jar, from jarra, to draw, pull; see grr in Semitic roots.] jar'ful' n.