high-altitude Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition adjective. occurring at or from a relative high altitude; highlevel bombing Example Sentence The pilots are trained in conditions simulating high-altitude flights. Synonyms high-level; high; a high level Antonyms low-level Hear It! Say It! Write It! high-altitude Switch to cursive Start Share with your friends: