disciplines Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition plural noun. areas of study or fields of knowledge. Example Sentence He disciplines the child. OR He practices various disciplines in the triathlon. More Example Sentences He studies different disciplines every year. Synonyms fields; branches; subjects Antonyms pardon; excuse Hear It! Say It! Write It! disciplines Switch to cursive Start Share with your friends: