halfway between two given points, times, limits, etc.; also, equally distant from all sides or extremities; in the center; mean
in between; intermediate; intervening
Gram.
denoting the voice or form of a verb whose subject is represented as acting reflexively, or upon itself: in Greek, such verbs are usually passive in grammatical form
in or of the middle voice
Geol. designating a division of a period or a formation between those called Upper and Lower
designating a stage in language development intermediate between those called Old and Modern: Middle English
noun
a point or part halfway between extremes; middle point, part, time, etc.