A person who goes to see an exhibition, show, or event. Slightly formal; often used in contexts like museums, galleries, or public displays.
The spectators at the exhibition were quietly viewing the works.
This museum welcomes many visitors each day.
Compound of 観覧 (viewing, inspection) + 者 (person). The exact historical derivation is uncertain, but the word follows a common Sino-Japanese pattern for agent nouns.