lib Get Printable Handwriting (lib) 1 syllables Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. a term often used to refer to a library or a library-related concept. Example Sentence He spoke ad lib. More Example Sentences The lib has many computers and resources. Synonyms library; books; reading room Hear It! Say It! Write It! lib Switch to cursive Start Share with your friends: