Definition of "fastball" []

• Baseball A pitch thrown at the pitcher's maximum speed. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "If he can properly locate it, his fastball is a good pitch against the Sox."
• "At this level, a fastball is a home run, basically."
• "Columbus about a week ahead of Beech, says the fastball is there and the breaking pitches are improving rapidly."