Definitions

1. adjective

having or relating to water that has not merged or mixed with the surrounding water, especially in the context of the Earth’s crust.

“The unimmerged aquifers in the region provided a vital source of clean water.”

2. verb

to come together or merge with the surrounding water, especially in the context of the Earth’s crust.

“The oceanic crust was unimmeged with the continental crust millions of years ago.”