A relic is a fragment from the past — one of Elvis's guitars, an ancient piece of pottery or even an outmoded way of thinking -– that remains behind. Your dad might love his old albums, but to you, they're just relics.
The noun relic is derived from relinquere, Latin for "to leave behind." A crumbling Roman wall is a relic of a once-great civilization. The superstition that seven years of bad luck will follow if you break a mirror may be a relic of the old superstition that a mirror can trap the souls of those reflected in it. Whether it's an object or an idea, a relic is a remnant of the past. Religious relics are items, such as Buddha’s tooth or St. Anne’s wrist bone, that have been preserved and venerated.