What does "roadster" mean?

Roadster: A horse that is accustomed to traveling on the high road, or is suitable for use on ordinary roads. A sound, swift, well-fed hunter and roadster. Thackeray.

Additional senses

  1. 2.A bicycle or tricycle adapted for common roads rather than for the racing track.
  2. 3.One who drives much; a coach driver. [Eng.]
  3. 4.A hunter who keeps to the roads instead of following the hounds across country. [Eng. Slang.]

Sources