midpoint

UK: /ˈmɪdpɔɪnt/ US: /ˈmɪdˌpɔɪnt/ ,(mid′point′)

WordReference Random House Learner's Dictionary of American English © 2025

mid•point /ˈmɪdˌpɔɪnt/   n. [countable]

1. a point at or near the middle of something, as a line:
   the midpoint of a line; the midpoint of the trip.

See -point-.

WordReference Random House Unabridged Dictionary of American English © 2025

mid•point  (mid′point′), n. 

1. a point at or near the middle of, or equidistant from, both ends, as of a line:
   the midpoint of a boundary.
2. a point in time halfway between the beginning and the end, as of a process, event, or situation:
   the midpoint of the negotiations.
3. [Geom.] the point on a line segment or an arc that is equidistant, when measured along the line or the arc, from both endpoints.
4. Economics [Statistics.] median (def. 5).
5. Astrology the point on the arc that is equidistant from two planets: regarded as a sensitive point and used in horoscopic interpretations.

Also, mid′-point′. 

• Middle English. See mid-, point 1325–75

Collins Concise English Dictionary © HarperCollins Publishers::

midpoint / ˈmɪdˌpɔɪnt/ noun

1. the point on a line that is at an equal distance from either end
2. a point in time halfway between the beginning and end of an event