'Stayer' definitions:

Definition of 'stayer'

From: WordNet
noun
A person or other animal having powers of endurance or perseverance; "the horse that won the race is a good stayer"

Definition of 'Stayer'

From: GCIDE
  • Stayer \Stay"er\ (st[=a]"[~e]r), n. One who upholds or supports that which props; one who, or that which, stays, stops, or restrains; also, colloquially, a horse, man, etc., that has endurance, as in a race. [1913 Webster]