noun which may take the genitive case particle 'no', noun
without spectators; behind closed doors; crowdless
Used especially for sports events, performances, or ceremonies held without a live audience. Often seen in news contexts.
東京オリンピックは無観客で開催された。
The Tokyo Olympics were held without spectators.
無観客試合でも選手たちは全力を尽くした。
Even in a crowdless match, the players gave their all.
Compound of 無 (without) and 観客 (spectators).