altitude Get Printable Handwriting (al-ti-tude) 3 syllables Rhymes Learn It! Spelling Test Definition noun. the height of a thing above a reference level especially above sea level or above the earth's surface Example Sentence I get sick from altitude when I travel into the mountains. Synonyms height; acme; ceiling; elevation; stature; apex Antonyms floor; low point Rhymes Three Syllable Rhymes (1) altitude Share with your friends: