from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The initial part of a stroke, in which one moves a racket or club, for instance, to the position from which forward motion begins.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The preparatory stroke preceding that which produces contact with the target. Normally associated with sports using an implement such as a bat, club, racket or stick.
back + swing (Wiktionary)