mainengine
nounUK /ˈmeɪn ˈɛndʒɪn/
US /ˈmeɪn ˈɛndʒɪn/
The main engine is the biggest and most important engine that makes a big machine or ship move.
The ship's main engine started with a loud rumble as it left the harbor.
RELATED WORDS
OTHER MEANINGS
2. The primary propulsion unit of a spacecraft or rocket.
The rocket's main engine fired for six minutes to reach orbit.
3. The central or most important driving force behind an activity or organization.
She is the main engine of the charity's fundraising efforts.
4. The largest locomotive engine in a train consist.
The main engine pulled the long freight train up the mountain pass.