upper stage

American  

[uhp-er steyj] / ˈʌp ər ˈsteɪdʒ /

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.

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Etymology

Origin of upper stage

First recorded 1955–60

Example Sentences

SpaceX’s 12th Starship test, despite engine issues and an upper stage explosion, deployed satellites and boosted sector interest.

From Barron's • May 26, 2026

The company did not intend to recover either the booster or the upper stage, and the final splashdown was fiery but controlled, as planned.

From Barron's • May 22, 2026

After the Super Heavy booster separated from the upper stage as expected, Huot said on the livestream that the booster failed to complete its so-called boost-back burn.

From Barron's • May 22, 2026

SpaceX’s Starship, a 408-foot rocket with 33 engines, is set for its 12th test flight, aiming for booster landing and upper stage objectives.

From Barron's • May 21, 2026

The upper stage of the Saturn V moon rocket was converted into living quarters for three astronauts.

From "Flying to the Moon: An Astronaut's Story" by Michael Collins