noun
admission free; free to attend
Used for public hearings, trials, lectures, or meetings that are open to the public without charge.
市議会の本会議は傍聴無料です。
The city council plenary session is free for the public to observe.
この講演会は傍聴無料です。
This lecture is free to attend.
Compound of 傍聴 (hearing, observing) and 無料 (free of charge).