Pronunciation: (siks'puns), [key]
—pl. -pence, -penc•es for 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.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.