noun
(now chiefly South Asia or law) The total amount of something; quantity.
The amount or quantity observably present, or available.
(physics) The smallest possible, and therefore indivisible, unit of a given quantity or quantifiable phenomenon.
(computing) The amount of time allocated for a thread to perform its work in a multithreaded environment.
(computing, uncountable) Ellipsis of quantum computing.
(medicine) The minimum dose of a pathogen required to cause an infection.
(mathematics) A definite portion of a manifoldness, limited by a mark or by a boundary.
adjective
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.