A notice or bulletin posted in a visible place (e.g., a poster, announcement). Also used as the verb 'to post/put up a notice' (掲示する).
掲示板に試験の日程を掲示しました。
I posted the exam schedule on the bulletin board.
会社からの重要な掲示は全員にメールでも知らせます。
Important notices from the company are also sent to everyone by email.
店の入口に営業時間を掲示してありますか？
Is the opening hours posted at the shop entrance?