vapourous Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition adjective. having the quality of vapor or mist. Example Sentence The morning fog was so vapourous that it was hard to see anything. More Example Sentences In the morning light the vapourous air sparkled. Synonyms misty; foggy; cloudy Antonyms clear; solid Hear It! Say It! Write It! vapourous Switch to cursive Start Share with your friends: