Bittern :: Bittern (n.) A wading bird of the genus Botaurus, allied to the herons, of various species..
Bittern :: Bittern (a.) The brine which remains in salt works after the salt is concreted, having a bitter taste from the chloride of magnesium which it contains..
Bittern :: Bittern (a.) A very bitter compound of quassia, cocculus Indicus, etc., used by fraudulent brewers in adulterating beer..
Bitterness :: Bitterness (n.) The quality or state of being bitter, sharp, or acrid, in either a literal or figurative sense; implacableness; resentfulness; severity; keenness of reproach or sarcasm; deep distress, grief, or vexation of mind..
Bitterness :: Bitterness (n.) A state of extreme impiety or enmity to God.
Bitterness :: Bitterness (n.) Dangerous error, or schism, tending to draw persons to apostasy..
Bitternut :: Bitternut (n.) The swamp hickory (Carya amara). Its thin-shelled nuts are bitter.