Hyder Ali (?ha?d?r ???l?) or Haidar Alin (Biography) 1722?82, Indian ruler of Mysore (1766?82), who waged two wars against the British in India (1767?69; 1780?82)Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014