mischiefs Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition plural noun. actions that cause trouble or harm. Example Sentence The children got into mischiefs and made a mess in the classroom. More Example Sentences They got into mischief at the park. Synonyms pranks; tricks; misdeeds Antonyms good deeds; honesty; kindness Hear It! Say It! Write It! mischiefs Switch to cursive Start Share with your friends: