Pronunciation: (siks'puns),[key] —n., —pl.-pence, -penc•esfor 2. 1. (used with a sing. or pl. v.)Brit.a sum of six pennies.
2. (used with a sing. v.) a cupronickel coin of the United Kingdom, the half of a shilling, formerly equal to six pennies: equal to two and one-half new pence after decimalization in 1971.