1
: a specific injury or damage attributed to a particular agent
… the polished floor … often causes mischiefs—bruises, sprains, dislocations …—Herbert Spencer
2
: a cause or source of harm, evil, or irritation
especially
: a person who causes mischief
He's a real mischief to his family.
3
a
: action that annoys or irritates
Halloween mischiefs
b
: the quality or state of being mischievous : mischievousness
had mischief in his eyes
Cite this Entry
“Mischief.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mischief. Accessed 6 Aug. 2026.
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