What is the meaning of Berme?

Alternative spelling of berm

guarantor

guarantee, bail

warmth

The head of foam present in beer that is aging.

barm (froth used for fermented and leavened food)

yeast (fungus that produces barm)

The head of foam present in a glass of beer.

Alternative form of barm (belly, chest)

first-person plural imperative of brát

berm

Source: wiktionary.org