noun

• (religion) A part of the body of a saint, or an ancient religious object, kept for veneration.
  "Why ſhould onely I, Of all the other Princes of the World, Be caſ’d-vp, like a holy Relique?"
• (cosmology) A particle or entity that has existed since the Big Bang.
  "One of the primary targets of current and especially future cosmological observations are light thermal relics of the hot big bang."

verb

• (transitive, uncommon, often of guitars) To cause (an object) to appear old or worn, to distress.
  "Age has become a fetish in the world of guitars where large amounts of money are paid for a specially “reliced” guitar. As one company, Relic Guitars, which offers this service claims, “The idea behind relicing a guitar is to artificially replicate the natural wear that occurs over many years […]”"