ion engine
noun
: a reaction engine deriving thrust from the ejection of a stream of ionized particles
Examples of ion engine in a Sentence
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On the surface, ion engines might seem like a poor choice for faster Mars missions.
—
New Atlas,
12 May 2026
Missions utilizing ion engines have so far obtained their power from the sun by unfurling solar arrays.
—
Keith Cooper,
Space.com,
5 May 2026
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New Atlas,
12 May 2026
Missions utilizing ion engines have so far obtained their power from the sun by unfurling solar arrays.
—
Keith Cooper,
Space.com,
5 May 2026
Cite this Entry
“Ion engine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ion%20engine. Accessed 6 Jul. 2026.
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