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

A state or country that is governed constitutionally as one single unit, with one constitutionally created legislature.

(physics) The stationary state of lowest energy of a particle or system of particles.

(US politics) The State of the Union address, an annual event in which a president of the United States reports the status of the country, normally to a joint session of the United States Congress.

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

(physics) any state of a particle or system of particles that has a higher energy than that of its ground state

plural of head of state

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

(philately, historical) Any of the Indian feudal states which, during the time of the British Empire, used overprinted Indian stamps valid for postage outside the state.

(philately) any of the Indian feudal states which operated their own internal postal services during the time of the British Empire, issuing stamps that were only valid within the state.