second base

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The base across the diamond from home plate, to be touched second by a runner.
• noun The position played by a second baseman.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun baseball The base opposite home plate in a baseball infield.
• noun colloquial Touching a woman's breast.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun the fielding position of the player on a baseball team who is stationed near the second of the bases in the infield
• noun the base that must be touched second by a base runner in baseball