What does 半 mean?
半 is a Japanese noun meaning “half (e.g., にじはん | half-past two)” in English. It can also be translated as “odd number, han (unit of land area, approx. 595.8 m^2)” depending on context. It is written as 半 in kanji, はん in hiragana, and han in romaji. This word is part of JLPT N5 vocabulary.
Example sentence
半時間したら彼はここに来るでしょう。
He will be here in half an hour.