mil·li·li·tre millilitres in AM, use milliliter A millilitre is a unit of volume for liquids and gases that is equal to a thousandth of a litre. 100 millilitres of blood. milliliter ml a unit for measuring an amount of liquid. There are 1000 millilitres in one litre
(ml) (noun) A unit of liquid volume in the metric system equivalent to one thousandth of a liter or approximately 03381 fluid ounces in the English system