Noun: understudy 'ún-du(r),stú-dee
- An actor able to replace a regular performer when required
"The understudy had to step in when the lead actress fell ill";
- standby
- Be an understudy or alternate for a role
"She understudied the lead actress in case of illness";
- alternate
Derived forms: understudied, understudies, understudying
Type of: actor, con [archaic], histrion [archaic], learn, memorise [Brit], memorize, player, role player, thesp [Brit, informal], thespian
Encyclopedia: Understudy