Pronunciation: (dīm),[key] —n. 1. a cupronickel-clad coin of the U.S. and Canada, the 10th part of a dollar, equal to 10 cents.
2. Slang. a. ten dollars.
b. a 10-year prison sentence.
c. See dime bag. 3. a dime a dozen,Informal.so abundant that the value has decreased; readily available.