from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Afraid of loud noise, such as that of gunfire.
- adj. Extremely distrustful or wary.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Afraid of guns, or the noise they make.
from The Century Dictionary and Cyclopedia
- Afraid of a gun; frightened by the report of a gun: said of a field-dog.
From gun + shy. (Wiktionary)