definition 1 : a quantity calculated with regard to another measured quantity.
example: They lost weight at an average rate of half a pound a week.
definition 2: the speed or pace at which something is accomplished.
example: You must work at a faster rate to get the job done on time.
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Collocations: words often used in combination with the noun “rate”
PREPOSITION + rate: at ~ (e.g., moving at a faster rate, accidents occurring at a rate of one per week)
VERB + rate: increase ~ , reduce ~ , achieve ~ (e.g., achieve a higher rate of production), improve ~ , fix ~ (e.g., fix the rate at a level of one hundred per day), measure ~ , compare ~ , decrease ~ , slow ~ , accelerate ~, double ~
rate + VERB: ~ increase (e.g., the rate increases yearly), ~ vary, ~ remain, ~ fall, ~ rise, ~ drop, ~ decline, ~ soar