Definition of midpoint noun from the Oxford Advanced American Dictionary

 

midpoint

 noun
noun
NAmE//ˈmɪdpɔɪnt//
 
[usually singular]
 
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the point that is at an equal distance between the beginning and the end of something; the point that is at an equal distance between two things the midpoint of the decade At its midpoint, the race had no clear winner. the midpoint between the first number and the last