A usually chronological record of events, as of the life or development of a people or institution, often including an explanation of or commentary on those events: a history of the Vikings. A formal written account of related natural phenomena: a history of volcanoes. A record of a patient's medical background. An established record or pattern of behavior: an inmate with a history of substance abuse. The branch of knowledge that records and analyzes past events: "History has a long-range perspective\u201d ( Elizabeth Gurley Flynn). The past events relating to a particular thing: The history of their rivalry is full of intrigue. The aggregate of past events or human affairs: basic tools used throughout history. An interesting past: a house with history. Something that belongs to the past: Their troubles are history now. Slang One that is no longer worth consideration: Why should we worry about him? He's history! A drama based on historical events: the histories of Shakespeare.