English definition of “rate”
/reɪt/ noun [C]
HOW MANY › how often something happens, or how many people something happens to: the birth rate the rate of unemployment
MONEY › a fixed amount of money given for something: the interest/exchange rate rates of pay
SPEED › the speed at which something happens: the rate of progress
at this rate › used before saying what will happen if a situation continues in the same way: At this rate we're not going to be there till midnight.
at any rate › used before saying one fact that is certain in a situation that you are generally not certain about: Well, at any rate we need her to be there.
first-/second-/third-rate › very good, bad, or very bad: a first-rate hotel → See also birth rate → See also exchange rate