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Meaning of walk-on

walk-on

Pronunciation: (wôk'on", -ôn"), [key]
— n.
  1. Also calleda small part in a play or other entertainment, esp. one without speaking lines. Cf. (def. 6).
  2. an entertainer or actor who plays such a part.
  3. an athlete trying out for a team who has not been drafted, specifically invited, scouted, awarded a scholarship, etc.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.