(logic) The operator, represented by the symbol ∀, used in predicate calculus to indicate that a predicate is true for all members of a specified set.

(now chiefly South Asia or law) The total amount of something; quantity. / The amount or quantity observably present, or available.

Of a change, sudden or discrete, without intermediate stages. / (informal) Of a change, significant. / (physics) Involving quanta, quantum mechanics or other aspects of quantum physics.

plural of quantum

(quantum mechanics) One of certain integers or half-integers that specify the state of a quantum mechanical system (such as an electron in an atom).

(quantum mechanics) The discontinuous change of the state of an electron in an atom or molecule from one energy level to another. / (figuratively) An abrupt, extreme change.

(physics) The branch of physics which studies matter and energy at the level of atoms and other elementary particles, and substitutes probabilistic mechanisms in place of classical Newtonian ones.

(quantum mechanics) A solid in which small magnetic moments have a fluctuating random orientation, even at low temperature

Capable of being quantified.

Something that can be quantified; a measurable.