To increase (something) in extent or intensity; to intensify or step up.
To climb.
In technical support, to transfer a customer, a problem, etc. to the next higher level of authority
(of a varying quantity) To reach a stable level after a period of increase; to level off.
A comparatively stable level after a period of increase.
A notable level of attainment or achievement.
A largely level expanse of land at a high elevation; tableland.