high-speed Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition adjective. moving or operating at a fast rate. Example Sentence The motel offers high-speed internet access. More Example Sentences High-speed internet is very important today. Synonyms fast; rapid; quick Antonyms slow; sluggish; leisurely Hear It! Say It! Write It! high-speed Switch to cursive Start Share with your friends: