Definition of Grand Marnier in English:
 Grand Marnier
noun ɡrɒ̃ ˈmɑːnɪeɪˌɡrän märnˈyā
mass nountrademark An orange-flavoured cognac-based liqueur.
 Example sentencesExamples
-  Mr Tudor had the roast duckling a l' orange with bread stuffing and a Grand Marnier orange sauce for €22.50.
 -  ‘In a Margarita, people want Grand Marnier,’ says Bleu's Amar.
 -  The top shot brands at the are Jagermeister, Rumpleminz, Grand Marnier and Tuaca.
 -  To round out the evening was a plate with goat cheese with a vinaigrette of oregano flowers, onion flowers and pepper, and then finally a Grand Marnier cream with orange flowers, coffee/tea and pralines.
 -  The drinks menu is spectacular, an awesome mix of classics with twists: try the Side Kick for kicks, a Sidecar with a Grand Marnier twist.
 
Origin
  
From the name of the French manufacturer Marnier-Lapostolle.