Definitions

1. noun

A section or stage between two others, especially in a process or a series of stages.

“The rocket had three interstages that burned before the payload reached orbit.”

2. adjective

Located or occurring between two stages or stages of development.

“The interstage design of the engine improved its efficiency significantly.”

3. verb

To place or position something between two stages or stages of development.

“The engineers will interstage the new components with the existing ones.”