シートベルトサインMeanings1nounseatbelt signRefers to the illuminated sign in an aircraft or vehicle indicating that seatbelts must be fastened.機き内ないでシートベルトサインが点てん灯とうしたら、すぐに席せきに戻もどってください。When the seatbelt sign comes on in the cabin, please return to your seat immediately.