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
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
Her sister's diagnosis later sent Paliouras on a mission to help other families.
—Megan Shinn, CBS News, 8 Feb. 2026
O'Connor's character appears to be on a mission to disclose this material, presumably proof that aliens exist.
—Brendan Morrow, USA Today, 8 Feb. 2026
See All Example Sentences for on a mission
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
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
Her sister's diagnosis later sent Paliouras on a mission to help other families.
—Megan Shinn, CBS News, 8 Feb. 2026
O'Connor's character appears to be on a mission to disclose this material, presumably proof that aliens exist.
—Brendan Morrow, USA Today, 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 11 Feb. 2026.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
