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.

QUIZZES

THINK YOU’VE GOT A HANDLE ON THIS US STATE NICKNAME QUIZ?

Did you ever collect all those state quarters? Put them to good use on this quiz about curious state monikers and the facts around them.
Question 1 of 8
Mississippi’s nickname comes from the magnificent trees that grow there. What is it?

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. 2021

Example sentences from the Web for sustainer

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
See Today's Synonym