Permanently no longer available or in production.

simple past tense and past participle of discontinue

(medicine) The process of quitting a course of treatment with a drug. / The act of stopping producing or supplying a product.

(transitive) To interrupt the continuance of; to put an end to, especially as regards commercial productions; to stop producing, making, or supplying.

having breaks or interruptions; intermittent / (mathematics) having at least one discontinuity

A lack of continuity, regularity or sequence; a break or gap. / (mathematics) A point in the range of a function at which it is undefined or discontinuous.

plural of discontinuity

The state or quality of being discontinuous.

In a discontinuous manner; not continuously.

plural of discontinuance