bittering noun 2adjective 1forms 1 noun2 •The act of making or becoming bitter.Aroma hops can be used for bittering also, and many homebrewers swear by this, claiming a finer, cleaner overall hop profile. — 2001 •A bitter compound, such as that used in adulterating beer or that removed from coffee.It is used as a kettle addition in conjunction with other post-fermentation bitterings. — 2013 adjective1 •Causing a bitter taste or smell.Centennial is an aroma-type cultivar that is used for its aromatic properties and bittering potential . — 2012 formsbitterings