noun
selected entrant; winning candidate
Refers to a person whose work (art, literature, design, etc.) has been chosen for a competition, exhibition, or prize. Also used for a candidate who wins selection.
彼女の絵が展覧会の入選者に選ばれた。
Her painting was selected for the exhibition.
今年のコンテストの入選者が発表された。
The winners of this year's contest were announced.
受賞者 is a prize winner, often for a specific award. 入選者 is broader, covering selection for exhibitions or competitions, not necessarily a prize.
Compound of 入選 (selection, winning) + 者 (person).