walk-on /ˈwɔːkɒn/noun 4walk on verb 2forms 4 noun4 •An actor of a small (or "bit") part in a theatrical production or film, often without speaking lines. •[before a noun] Such a part in a play or film.Did you exchange / A walk-on part in the war for a lead role in a cage? — 1975 •A student athlete who wants to try out for a college sports or athletic team without the benefit of a scholarship or having been recruited. •One who arrives and boards transport (such as a train or ferry) without having booked in advance.If you have a walk-on ticket you can have a full refund before the date of travel without paying the usual £10 administration fee. — 2020 walk on verb2 •To come onstage.He walks on after your line. •To join a college sports team without being recruited for it.He walked on this year. formswalked on · walking on · walks on · walk-ons