The crossword solution for the term TITLE FOR GILBERT OR SULLIVAN is SIR, which is an acronym for 'Knight of the Order of the British Empire'. This is a title of honour given by the British monarch to individuals who have made significant contributions to the arts, sciences, public services, or other areas of public life. SIR W.S. Gilbert and SIR Arthur Sullivan were two English composers who collaborated on a series of comic operas in the late 19th century. These works are still popular today and are known as the Gilbert and Sullivan operas.