1A signature — the act of writing one's own name on a document or contract, or the signature itself, used to indicate identity or consent.
契約書に署名してからコピーを渡してください。
Please sign the contract and then give me a copy.
電子署名は紙の署名と同じ法的効力を持つことが多い。
Electronic signatures often carry the same legal weight as handwritten signatures.
書類の署名欄に名前を記入し、署名した。
I filled in my name in the document's signature field and signed it.