run its course

US /rʌn ɪts kɔrs/
UK /rʌn ɪts kɔrs/
"run its course" picture
1.

to come to a natural end; to develop and finish naturally

:
•
Their relationship had simply run its course.
•
The doctor said the illness would have to run its course.
:
courseof coursein the course ofon courserunningrunrun into