from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The part of a missile flight between the end of the launching phase and reentry, during which corrective maneuvers are made.
- n. The middle point of a course or of a course of action.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. In the middle of a course
mid- + course (Wiktionary)