Definition of "courser"

courser

/ˈkɜːsə/

noun
plural coursers
1. A dog used for coursing.
2. A hunter who practises coursing.
3. A swift horse; a racehorse or a charger.
  Quotations
  Sir Launfal is instantly set at liberty, and vaulting on the courser his mistress had bestowed on him, and which was held at hand by his squire, he follows her out of the town.
  1828, Thomas Keightley, The Fairy Mythology, volume I, London: William Harrison Ainsworth, page 57
4. Any of several species of terrestrial bird in the genera Cursorius or Rhinoptilus of the family Glareolidae.
5. A stone used in building a course.