thunderbolts Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition plural noun. powerful flashes of lightning accompanied by thunder. Example Sentence The thunderbolts quivered with elfin flares of heat lightning. More Example Sentences Thunderbolts crashed around the tall trees. Synonyms lightning strikes; flashes; bolts Hear It! Say It! Write It! thunderbolts Switch to cursive Start Share with your friends: