ne·o·con·ser·va·tism (n???-k?n-sûr?v?-t?z??m)n. A political philosophy developed in the 1970s and 1980s, advocating the active use of government power in pursuit of conservative domestic and foreign policies.ne?o·con·ser?va·tive adj. & n.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.ne?o?con?serv?a?tism (?ni o? k?n?s?r v??t?z ?m) n. a moderate form of political conservatism that generally opposes big government but supports social welfare and certain other liberal goals. [1960?65] ne`o?con?serv?a?tive, n., adj. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.neoconservatisma new movement in conservatism, usually seen as a move further to the right of the position currently occupied by conservatives in politics or in attitudes. ? neoconservative, n., adj.See also: Attitudes, Politics-Ologies & -Isms. Copyright 2008 The Gale Group, Inc. All rights reserved.