say it: sawm
somme is a noun meaning "battle of World War II (1944)". It carries 2 recorded senses.
battle of World War II (1944)
France
battle in World War I (1916)
France
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for somme come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.