What do scientists mean when they say “The land is rising faster than sea level due to isostatic rebound from the last glaciation”?

Isostatic rebound happens when land that was pressed down in the last ice age by the glaciers rises as a result of disappearing ice. The depressed land is "bouncing back", or rebounding – a process called isostasy. In some places in Nunavut, the land is rebounding faster than the sea level is rising. This makes it appear as if the sea level is actually dropping, although on a global scale scientists have confirmed sea levels are rising.