A unit of volume that can refer to either 20 fluid ounces in the uk or 16 fluid ounces in the us for liquids, approximately 33.6 cubic inches for dry goods in the us, 1.696 liters in hungary, or 12 fluid ounces in medicine.
(Britain, metonymically) A pint of milk.
(UK, metonymically) A glass of beer or cider, served by the pint.