on a mission
idiom
: undertaking a task that one considers to be a very important duty
She's on a mission to locate her lost sister.
Examples of on a mission in a Sentence
Recent Examples on the Web
In 1906, American political cartoonist Homer Davenport, on a mission from President Theodore Roosevelt, traveled to Aleppo, Syria, to acquire Arabian horses for a US cavalry breeding program.
—
Camilla Wright, semafor.com, 17 Feb. 2026
An unannounced test of NASA's towering Space Launch System rocket uncovered another issue with the vehicle meant to soon launch astronauts on a mission around the moon.
—Eric Lagatta, USA Today, 16 Feb. 2026
Other Avina Comics characters include a mariachi man who fights monsters using a silver string guitar and a luchador wrestler on a mission.
—Anna Ortiz, Chicago Tribune, 10 Feb. 2026
The 2021 book by The Martian author Andy Weir centers on Grace as he is sent to a neighboring star on a mission to save the Earth.
—Aaron Couch, HollywoodReporter, 8 Feb. 2026
See All Example Sentences for on a mission
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Camilla Wright, semafor.com, 17 Feb. 2026
An unannounced test of NASA's towering Space Launch System rocket uncovered another issue with the vehicle meant to soon launch astronauts on a mission around the moon.
—Eric Lagatta, USA Today, 16 Feb. 2026
Other Avina Comics characters include a mariachi man who fights monsters using a silver string guitar and a luchador wrestler on a mission.
—Anna Ortiz, Chicago Tribune, 10 Feb. 2026
The 2021 book by The Martian author Andy Weir centers on Grace as he is sent to a neighboring star on a mission to save the Earth.
—Aaron Couch, HollywoodReporter, 8 Feb. 2026
See All Example Sentences for on a mission
Cite this Entry
“On a mission.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/on%20a%20mission. Accessed 18 Feb. 2026.
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