fast·​ball | \ ˈfas(t)-ˌbȯl How to pronounce fastball (audio) \

Definition of fastball

: a baseball pitch thrown at full speed and often appearing to rise slightly as it nears the plate

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Other Words from fastball

fastballer \ ˈfas(t)-​ˌbȯ-​lər How to pronounce fastballer (audio) \ noun

Examples of fastball in a Sentence

He struck him out with a fastball.

Recent Examples on the Web

John Fisher/Cal Sport Media, via Associated Press CLEVELAND — Justin Verlander threw the first pitch of the All-Star Game here on Tuesday night, missing on a fastball before eventually retiring Milwaukee’s Christian Yelich on a liner to first. Tyler Kepner, New York Times, "‘Just Come Out and Say It’: Players Want Answers on the Changing Ball," 9 July 2019 Yuli Gurriel powered an opposite-field shot on a 93-mph fastball. Andy Mccullough,, "Andrew Heaney pays tribute to Tyler Skaggs in Angels’ loss to Astros," 6 July 2019 Martinez, Bogaerts rest Xander Bogaerts’s 17th homer of the season Friday came on a 2-0 fastball located middle-in. Julian Mcwilliams,, "Is the Red Sox’ recent offensive explosion for real?," 6 July 2019 Hiura did not wait around, jumping on a first-pitch fastball, down and in, and lining it to center for a single. Tom Haudricourt, Milwaukee Journal Sentinel, "Reds 1, Brewers 0: Once again, no fireworks for the offense against Cincinnati pitchers," 4 July 2019 Herrmann’s slam came on a 1-1 fastball, effectively booting Odorizzi out of the game with no outs in the fourth inning. Shayna Rubin, The Mercury News, "Catcher Chris Herrmann makes grand entrance to Oakland A’s lineup," 2 July 2019 With two on and none out, the Phillies’ Scott Kingery jumped on a 3-1 fastball and sent it out to left for a three-run homer. Nick Piecoro, azcentral, "Dejected Jon Duplantier receives encouragement after rough outing against Phillies," 12 June 2019 Nobody else turned on more than 33 fastballs for home runs. Tom Verducci,, "Seven Reasons Behind Jose Ramirez's Strange and Steep Decline," 10 June 2019 Graterol has pitched to a 1.89 ERA in nine starts while showing off a 100 mph fastball. Jon Becker, The Mercury News, "AL’s top teams may be cooling on Madison Bumgarner pursuit," 26 June 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'fastball.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of fastball

1899, in the meaning defined above

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Statistics for fastball

Last Updated

13 Jul 2019

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Time Traveler for fastball

The first known use of fastball was in 1899

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More Definitions for fastball



English Language Learners Definition of fastball

baseball : a pitch that is thrown at full speed : a very fast pitch

More from Merriam-Webster on fastball

Rhyming Dictionary: Words that rhyme with fastball Encyclopedia article about fastball

Comments on fastball

What made you want to look up fastball? Please tell us where you read or heard it (including the quote, if possible).


appealing forcibly to the mind or reason

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