x-intercept Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. the point where a line crosses the x-axis. Example Sentence She calculated the x-intercept of the equation. Spelled with a hyphen. More Example Sentences Finding the x-intercept is important in math. Synonyms root; solution; crossing point Hear It! Say It! Write It! x-intercept Switch to cursive Start Share with your friends: