Dictionary.com

sustainer

[ suh-stey-ner ]
/ səˈsteɪ nər /
Save This Word!

noun
a person or thing that sustains.
Rocketry.
  1. any stage of a multistage rocket or guided missile that sustains flight after the burnout of the booster.
  2. the rocket engine or cluster of engines contained in such a stage.
QUIZ
CAN YOU ANSWER THESE COMMON GRAMMAR DEBATES?
There are grammar debates that never die; and the ones highlighted in the questions in this quiz are sure to rile everyone up once again. Do you know how to answer the questions that cause some of the greatest grammar debates?
Question 1 of 7
Which sentence is correct?

Origin of sustainer

First recorded in 1350–1400, sustainer is from the Middle English word sosteynere.See sustain, -er1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use sustainer in a sentence

British Dictionary definitions for sustainer

sustainer
/ (səˈsteɪnə) /

noun
a rocket engine that maintains the velocity of a space vehicle after the booster has been jettisoned
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
FEEDBACK