a.

1. 中央的，中間的，中部的
   It was a cold mid winter night.

   這是一個寒冷的、仲冬的夜晚。

   from mid June to mid August

   從六月中旬到八月中旬

adj.

1. of or in the middle of a range.
2. Phonetics  (of a vowel) pronounced with the tongue neither high nor low.

prep.