Base

- a locality from which operations are projected or supported;
- an area or locality containing installations which provide logistic or other support;
home airfield or home carrier [U. S. Department of Defense, p. 21].
- an area or facility from which a military force begins its offensive operations, to which it falls back in case of reverse, and in which supply facilities are organized. [U. S. Department of Defense, p. 118].
- a center or area of operations;
- a permanent military installation;
- a naval base;
- the place from which a military force draws supplies;
- a place where military operations begin [Merriam-Webster Online Dictionary].

Sources:

Base. Merriam-Webster Online Dictionary. Retrieved from: https://www.merriam-webster.com/dictionary/base