What is the meaning of rate?

noun

• A magnitude or frequency relative to a time unit.
  • usage: "they traveled at a rate of 55 miles per hour"; "the rate of change was faster than expected"
• Amount of a charge or payment relative to some basis.
  • usage: "a 10-minute phone call at that rate would cost $5"
  • synonyms: charge per unit
• The relative speed of progress or change.
  • usage: "he lived at a fast pace"; "he works at a great rate"; "the pace of events accelerated"
  • synonyms: pace
• A quantity or amount or measure considered as a proportion of another quantity or amount or measure.
  • usage: "the literacy rate"; "the retention rate"; "the dropout rate"

verb

• Assign a rank or rating to.
  • usage: "how would you rank these students"; "The restaurant is rated highly in the food guide"
  • synonyms: rank, range, order, grade, place
• Be worthy of or have a certain rating.
  • usage: "This bond rates highly"
• Estimate the value of.
  • usage: "How would you rate his chances to become President"; "Gold was rated highly among the Romans"
  • synonyms: value