This is the definition of a gas.
The state of matter having a definite volume but no definite shape is liquid.
A state of matter having definite volume but no definite shape is called, "liquid".
Liquid
a solid
gas
Gas
gas
The state of matter that has definite shape and definite volume is called solid.
The state of matter with a definite volume but no definite shape is called a liquid.
No state of matter corresponds to this. Solids are the only state with definite shape, but they have a definite volume too.
The state of matter is actually to states of matter. Solid and liquid are the states of matter that have a volume,(liquid) and shape(solid).
The state of matter that has no definite shape or volume is called a gas.