Does A Liquid Have A Definite Volume. The volume of a certain amount of oil can be measured, but the shape that the oil takes depends on what container it is in. The number of people doesn't change unless you add or take away people.
Liquids have a definite volume but not a definite shape. Just as an example, have a look to the paper: New drop weight analysis for surface tension determination of liquids. Also a single drop of these liquids dispensed from needle will have definite volume.
Liquids have no definite shape but have definite volume.
If a given volume of a liquid is poured into a tall narrow container, the liquid takes on a tall narrow shape.
The instrument used depends on the actual volume of the liquid and the desired degree of accuracy. Liquids have definite volume but the space they occupy is dependent on the container in which they are placed. Glass is a liquid and it does have a shape and volume.