1: the act of referring or consulting 2: a bearing on a matter :relation<in reference to your recent letter> 3: something that refers: as a:allusion, mentionb: something (as a sign or indication) that refers a reader or consulter to another source of information (as a book or passage) c: consultation of sources of information 4: one referred to or consulted: as a: a person to whom inquiries as to character or ability can be made b: a statement of the qualifications of a person seeking employment or appointment given by someone familiar with the person c (1): a source of information (as a book or passage) to which a reader or consulter is referred(2): a work (as a dictionary or encyclopedia) containing useful facts or information d:denotation, meaning