warhorse
nounA horse used in combat; a charger.
nounA person who has been through many battles, struggles, or difficult experiences.
nounA musical or dramatic work that has been performed so often that it has become widely familiar.
nounAny
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An experienced person who has been through many battles, situations or contests; someone who has given long service.
nounan experienced person who has been through many battles; someone who has given long service
nouna work of art (composition or drama) that is part of the standard repertory but has become hackneyed from much repetition
nounhorse used in war