terabyte Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. a unit of digital information equal to 1,024 gigabytes. Example Sentence I just bought a new hard drive with a storage capacity of one terabyte. More Example Sentences He bought a terabyte hard drive. Synonyms TB; data unit; storage size Antonyms kilobyte; megabyte Hear It! Say It! Write It! terabyte Switch to cursive Start Share with your friends: