upper stage

[ uhp-er steyj ]

noun

, Rocketry.

1. in a two-stage or multistage rocket, a secondary stage that is activated after the primary or lowest stage has fallen away, and that propels the spacecraft or other payload into orbit or on its intended interplanetary trajectory.

Word History and Origins

Origin of upper stage¹

First recorded 1955–60

Example Sentences

As to the permanent floor, or upper stage, of which he speaks, he may or may not be correct in his statement.

From Project Gutenberg

The diameter is but a little over twenty-six feet, and the light is admitted by small windows in the upper stage.

From Project Gutenberg

Here the tower rises picturesquely above the transept, but the belfry and upper stage are modern and very poor.

From Project Gutenberg

He refers, no doubt, to the upper stage, the design of which agrees with this statement.

From Project Gutenberg

The squinches which supported this spire may still be seen in the upper stage just described.

From Project Gutenberg