The lower limit — the minimum permissible or observed value in a range or measurement.
この装置の温度下限は−20度だ。
The device's lower temperature limit is −20°C.
参加資格の年齢は20歳を下限としている。
The minimum age for participation is set at 20.
給与の下限が引き上げられる見込みだ。
The minimum salary is expected to be raised.
In mathematics, the infimum of a set — the greatest lower bound (the largest value that is less than or equal to every element of the set).
集合Aの下限（infimum）は0だが、最小元は存在しない。
The infimum of set A is 0, but the minimum element does not exist.
実数の区間では、閉区間の下限は最小値と一致する。
For real-number intervals, the lower limit of a closed interval coincides with its minimum.