being at or near the middle point of

in mid autumn.

being or occupying a middle place or position

in the mid nineties of the last century.

Phonetics . (of a vowel) articulated with an opening above the tongue relatively intermediate between those for high and low

the vowels of beet, bet, and hot are respectively high, mid, and low. Compare high def. 23 low def. 30

Archaic . the middle.

adjective

center , medial , median , middle , central , intermediate , mean , middle-of-the-road , midway