run its course

idiom

Definition of run its course

used to say that something begins, continues for a time, and then endsThe disease usually runs its course in a few days.

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“Run its course.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/run%20its%20course. Accessed 29 Nov. 2020.

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