rate

noun

1. : a fixed ratio between two things

   a : a charge per unit of a commodity provided by a public utility

   b : an amount of payment or charge based on another amount; specifically : the amount of premium per unit of insurance : the amount of premium per unit of insurance

   c : a unit charge or ratio used in assessing property taxes

3. a : a quantity, amount, or degree of something measured per unit of something else

   b : an amount of payment or charge based on another amount; specifically : the amount of premium per unit of insurance : the amount of premium per unit of insurance