Grade 0 horizons Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. 1 the line at which the earth and the sky seem to meet; 2 the line at the farthest place that you can see Example Sentence You cannot close your eyes to new horizons. Synonyms skyline; border; edge Antonyms high in the sky; midpoint; close Hear It! Say It! Write It! horizons Switch to cursive Start Share with your friends: