1. 量を計って、示すための計測器、例えばワイヤーの厚みまたは雨その他の量(a measuring instrument for measuring and indicating a quantity such as the thickness of wire or the amount of rain etc.)
2. 管や銃身の直径(diameter of a tube or gun barrel)
3. ワイヤーの厚み(the thickness of wire)
4. 鉄道のレールか列車のホイールの間の距離(the distance between the rails of a railway or between the wheels of a train)
5. 量または質に関して認可または承認されている事例で、それを基に判断、測量または比較する(accepted or approved instance or example of a quantity or quality against which others are judged or measured or compared)