What state of matter has a definite volume but no definite shape?

The state of matter that has a definite volume but no definite shape is indeed liquid. In liquids, the molecules are close together, which allows them to maintain a fixed volume. However, the molecules are not arranged in a rigid structure, allowing them to move past one another. This mobility is what gives liquids the ability to take the shape of the container they are in, rather than retaining a specific shape like solids do. This characteristic distinguishes liquids from solids, which have both a definite volume and a definite shape, as well as from gases, which have neither a definite volume nor shape. Plasma, on the other hand, is an ionized state of matter typically found at extremely high temperatures and does not apply in this context of comparing basic states of matter.