element Get Printable Handwriting (el-e-ment) 3 syllables Rhymes Learn It! Spelling Test Definition noun. 1 a substances that cannot be separated into simpler substances and that singly or in combination constitute all matter 2 an abstract part of something Example Sentence Uranium is a radioactive element. Synonyms part; piece; component Antonyms emptiness Rhymes Three Syllable Rhymes (1) element Share with your friends: