one rank; one grade; a step up
Wasei-eigo noun used to describe moving up a single level in skill, quality, or status. Often used in phrases like ワンランク上の or ワンランクアップ.
このホテルはワンランク上のサービスを提供している。
This hotel offers a higher level of service.
His English ability has improved by one level.
Variant with interpunct; rarely used in practice.
Wasei-eigo from English 'one' + 'rank'.