Hashemite adjective 1noun 1forms 1 adjective1 •Relating to or being descendants of Hashim.In 1924 the Hashemite King Hussein was driven out of the Hedjaz by Ibn Saud, and a state of war sprang up between the new kingdoms of Saudi Arabia and Trans-Jordan. — 1956 noun1 •One who lays claim to being a direct descendant of Hashim, the great grandfather of the Islamic prophet Muhammad. formsHashemites