volcanic ash Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. fine particles of rock and minerals from a volcano. Example Sentence The sky turned dark due to the volcanic ash from the erupting mountain. More Example Sentences Farmers must clean volcanic ash off crops. Synonyms ash; pumice; tephra Antonyms clean air; clear sky Hear It! Say It! Write It! volcanic ash Switch to cursive Start Share with your friends: