mortar and pestle Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. a tool used to crush and grind substances into a powder. Example Sentence She crushed the fresh herbs using a mortar and pestle. Synonyms grinder; crusher; muller Antonyms whole; uncrushed Hear It! Say It! Write It! mortar and pestle Switch to cursive Start Share with your friends: