Meaning of “rate” - Learner’s Dictionary

rate

noun [ C ] us uk /reɪt/
Extra Examples
The accident rate has fallen in recent years.The country has a high infant mortality rate.The government says the crime rate has fallen.New forms of treatment have increased the survival rate.Divorce rates have risen in the last twenty years.
HOW MANY

B2 how often something happens, or how many people something happens to:

the birth rate
the rate of unemployment
MONEY

B2 a fixed amount of money given for something:

the interest/exchange rate
rates of pay
SPEED

B2 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:

→ See also birth rate , exchange rate

(Definition of “rate noun” from the Cambridge Learner’s Dictionary © Cambridge University Press)