run a fever

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run a fever

To be sick with a fever. After my toddler was lethargic all day, I begin to worry that she was running a fever.
See also: fever, run

run a fever

Also, run a temperature. Suffer from a body temperature higher than normal, as in She was running a fever so I kept her home from school. These idioms use run in the sense of "cause to move," in this case upward. [Early 1900s]
See also: fever, run