(chemistry) the state of an atom having a particular oxidation number

(physics) a vacant electron energy state near the top of the energy band of a solid; the movement of electrons between such states is the basis of electrical conduction

The psychological state of someone's cognitive processes at a certain time; the condition or character of a person's thoughts or feelings.

(physics) A composite of two or more particles that behaves as a single particle.

Alternative spelling of city state

plural of head of state

A sovereign city, as in Ancient Greece, often part of a league of such cities.

A political entity whose political status is less than that of a fully sovereign nation-state, as with the former Congo Free State and the former Irish Free State.

(government, politics) A political entity (a state) associated with a particular cultural entity (a nation) and a sovereign territorial unit.

(sciences) Any of the different phases of matter whose properties are dependent on the motions and forces of the molecules of which they are composed.