SoufrièrePronunciation: /ˌsuːfrɪˈɛː/Definition of Soufrière 1a dormant volcano on the French island of Guadeloupe in the Caribbean. Rising to 1,468 m (4,813 ft), it is the highest peak in the Lesser Antilles. 2an active volcanic peak on the island of St Vincent in the Caribbean. It rises to a height of 1,234 m (4,006 ft). Origin:French, from soufre 'sulphur'Soufrière in other Oxford dictionaries Definition of Soufrière in the US English dictionary