Nat (næt) n1. (Government, Politics & Diplomacy) a member or supporter of the Scottish National Party2. (Government, Politics & Diplomacy) NZ a member of the National Party3. (Government, Politics & Diplomacy) NZ a Member of Parliament for the National PartyCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014nat. 1. national. 2. native. 3. natural. 4. naturalist. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.