What is Interstage?

Interstage definition and meaning on Dictionary terms:
a single step or degree in a process; a particular phase, period, position, etc., in a process, development, or series.
a raised platform or floor, as for speakers, performers, etc.

Theater. the platform on which the actors perform in a theater.this platform with all the parts of the theater and all the apparatus back of the proscenium.

the stage, the theater, especially acting, as a profession: He plans to make the stage his career.
Movies. sound stage.
the scene of any action.
a stagecoach.
a place of rest on a journey; a regular stopping place of a stagecoach or the like, for the change of horses, mules, etc.
the distance between two places of rest on a journey; each of the portions of a journey.
a portion or period of a course of action, of life, etc.: the adolescent stage of human development.
Entomology. any one of the major time periods in the development of an insect, as the embryonic, larval, pupal, and imaginal stages.Also called stadium.any one of the periods of larval growth between molts.

Economics, Sociology. a major phase of the economic or sociological life of human beings or society: the patriarchal stage.
Geology. a division of stratified rocks corresponding to a single geologic age.
the small platform of a microscope on which the object to be examined is placed.
Radio. an element in a complex mechanism, as a tube and its accessory structures in a multiple amplifier.
Rocketry. a section of a rocket containing a rocket engine or cluster of rocket engines, usually separable from other such sections when its propellant is exhausted.

verb (used with object), staged, stag