noun which may take the genitive case particle 'no', noun
longest; maximum length; maximum duration
Used for the greatest length, distance, or span of time among a set. Common in patterns such as 最長の, 世界最長, and 最長で.
Antonyms: 最短
これは世界最長のつり橋です。
This is the world's longest suspension bridge.
審査には最長で二週間かかります。
The review will take up to two weeks.
noun which may take the genitive case particle 'no', noun
oldest; most senior
A rare or dictionary-noted use meaning oldest by age or seniority. In ordinary modern Japanese, 最年長 is usually clearer for this meaning.
Antonyms: 最少
「最長」が「最も年上」という意味で使われる場合もあるが、普通は「最年長」と言う。
最長 is sometimes used to mean 'oldest,' but normally one says 最年長.
This slide is at most 50 meters long.
The treatment can take up to three years at most.
This bridge is the longest suspension bridge in the world.