Adullamite (??d?l??ma?t) n (Government, Politics & Diplomacy) a person who has withdrawn from a political group and joined with a few others to form a dissident group[C19: originally applied to members of the British House of Commons who withdrew from the Liberal party (1866); alluding to the cave of Adullam in the Bible, to which David and others fled (1 Samuel 22: 1?2)]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014