O’Con·nell (?-k?n??l), Daniel Known as “the Liberator.” 1775-1847. Irish political leader. He founded the Catholic Association (1823) and was a leader in the struggle for Catholic emancipation and reform of the Irish government.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.O’Connell (???k?n?l) n (Biography) Daniel. 1775?1847, Irish nationalist leader and orator, whose election to the British House of Commons (1828) forced the acceptance of Catholic emancipation (1829)Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014