properly, "a piece of silver," denotes (a) "silver," e.g., Acts 3:6; (b) a "silver coin," often in the plural, "pieces of silver," e.g., Matthew 26:15; so Matthew 28:12 , where the meaning is "many, (hikanos) pieces of silver;" (c) "money;" it has this meaning in Matthew 25:18,27; 28:15; Mark 14:11; Luke 9:3; 19:15,23; 22:5; Acts 8:20 (here the RV has "silver").
Note: In Acts 7:16 , for the AV, "(a sum of) money," the RV has "(a price in) silver." See SILVER.lit., "a thing that one uses" (akin to chraomai, "to use"), hence, (a) "wealth, riches," Mark 10:23,24; Luke 18:24; (b) "money," Acts 4:37 , singular number, "a sum of money;" plural in 8:18,20; 24:26. See RICHES.
"copper," is used, by metonymy, of "copper coin," translated "money," in Mark 6:8; 12:41 . See BRASS.
primarily "a slice" (akin to keiro, "to cut short"), hence, "a small coin, change," is used in the plural in John 2:15 , "the changers' money," probably considerable heaps of small coins.
primarily "that which is established by custom" (nomos, "a custom, law"), hence, "the current coin of a state, currency," is found in Matthew 22:19 , "(tribute) money." In the Sept., Nehemiah 7:71 .
Note: In Matthew 17:27 , AV, stater ("a coin," estimated at a little over three shillings, equivalent to four drachmae, the temple-tax for two persons), is translated "piece of money" (RV, "shekel"). See SHEKEL.