landslides Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. the rapid downward movement of a mass of rock, earth, or artificial fill on a slope. Example Sentence The heavy rain caused several landslides in the mountainous region. Synonyms rockslide; mudslide; avalanche Antonyms uplift; ascension Hear It! Say It! Write It! landslides Switch to cursive Start Share with your friends: