The number eight (8). Can be written in kanji or Arabic numeral; a variant form 捌 is used in legal documents.
会議は八時に始まりますので、遅れないでください。
The meeting starts at eight o'clock, so please don't be late.
今日は八人で食事に行く予定だ。
Today we plan to go eat with eight people.
金額の欄には正確に「捌」を使って書く必要がある場合がある。
In some cases you must write the amount using the legal form '捌' precisely.