Precursor

Precursor or Precursors may refer to:
 * A word meaning predecessor.
 * Gehrlein Precursor, glider
 * Precursor (chemistry), a compound that participates in the chemical reaction that produces another compound
 * Precursor (physics), a phenomenon of wave propagation in dispersive media
 * Earthquake precursor, a diagnostic phenomenon that can occur before an earthquake
 * Precursor (bird), a hypothesized genus of fossil birds that was actually composed of fossilized parts of unrelated animals
 * The Precursors (video game), a video game from Kiev-based developer Deep Shadows
 * LNWR Whale Precursor Class, type of passenger locomotive developed for the London and North Western Railway.
 * Precursor, a novel set in the Foreigner universe by C. J. Cherryh
 * Precursors, a fictional race (now extinct) of ancient beings in the board game Cosmic Encounter.
 * Precursors, a fictional alien race in the Star Control video game series
 * Precursors, a fictional race of ancient beings in the video game Jak and Daxter: The Precursor Legacy.
 * Precursors, a fictional alien race in Galactic Civilizations II: Dread Lords video game.
 * Precursor, a Half-Life 2: Episode Two Modification.