airborne particles Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. small bits of matter in the air. Example Sentence People with allergies may react to airborne particles like pollen. More Example Sentences They can cause allergies and sickness. Synonyms dust; pollen; smoke Antonyms settled matter; solid mass; clean air Hear It! Say It! Write It! airborne particles Switch to cursive Start Share with your friends: