Somme, Battle of the Syllabification: (Somme, Battle of the)Definition of Somme, Battle of the a major battle of World War I between the British and the Germans, on the Western Front in northern France July-November 1916. More than a million men on both sides were killed or wounded. Somme, Battle of the in other Oxford dictionaries Definition of Somme, Battle of the in the British & World English dictionary