A seal or stamp used to mark documents (a hanko); used in expressions like 'to stamp' (判を押す).
契約書に判を押してください。
Please stamp (put your seal on) the contract.
この書類には会社の判が必要だ。
This document requires the company's seal.
彼は重要な決定に自ら判を押した。
He personally stamped/approved the important decision.
A judgment or decision (as in a court decision); often seen in expressions like 'a judgment is given' or 'to render a judgment.'
裁判でついに判が下された。
Finally, a judgment was handed down in the trial.
陪審の判が会社に不利に出た。
The jury's decision went against the company.
編集部が記事の掲載可否の判を下す。
The editorial department makes the decision on whether to publish the article.
A suffix indicating the size of paper or books (e.g., A-ban, B-ban referring to size formats).
この雑誌はA判で印刷されている。
This magazine is printed in A-size format.
写真集はB判の大きさだ。
The photo book is B-size.
判型を変更して再版する予定だ。
They plan to change the format size and reprint it.