否ひ定てい応おう答とう

noun

negative acknowledge; NAK

Technical term in data communication: a signal sent to indicate that a message was received with errors or cannot be accepted. Often abbreviated as NAK.

• 受じゅ信しん側がわが否ひ定てい応おう答とうを返かえした場ば合あい、送そう信しん側がわはデータを再さい送そうする。

  If the receiver returns a negative acknowledge, the sender retransmits the data.