[grahn mahr-nyey; French grahn mar-nyey]
a brand of French liqueur having a brandy base and an orange flavor.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
trademark a French cognac-based liqueur with an orange flavour
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
French cognac-based liqueur, 1901, from French grand "great" (see grand (adj.)) + Marnier-Lapostolle, name of the manufacturer.
Online Etymology Dictionary, © 2010 Douglas Harper