Teller \Tell"er\, n.

1. One who tells, relates, or communicates; an informer, narrator, or describer.

2. One of four officers of the English Exchequer, formerly appointed to receive moneys due to the king and to pay moneys payable by the king. --Cowell.

3. An officer of a bank who receives and counts over money paid in, and pays money out on checks.

4. One who is appointed to count the votes given in a legislative body, public meeting, assembly, etc.

Source: Webster's Revised Unabridged Dictionary (1913)