Standard Lemma guide

fastball

noun · verb · 4 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • US: Recorded audio is listed in the source snapshot.
  • CMU ARPABET: F AE1 S T B AO2 L Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

noun

Meaning 1

A high-speed pitch of a baseball.

Definition source: English Wiktionary via Wiktextract

Topics: ball-games, baseball, games, hobbies, lifestyle, sports

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

A four-seam fastball, which is a backspin pitch thrown with a ball gripped in the direction to cause four of the seams of the ball to cross the flight path and released with roughly equal pressure by the index and middle fingers

Definition source: English Wiktionary via Wiktextract

Usage: specifically

Topics: ball-games, baseball, games, hobbies, lifestyle, sports

Examples

  • The pitcher had a blazing fastball.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

verb

Meaning 3

To throw (something) at a high speed.

Definition source: English Wiktionary via Wiktextract

Usage: transitive

Topics: ball-games, baseball, games, hobbies, lifestyle, sports

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

noun

Meaning 4

(baseball) a pitch thrown with maximum velocity

Definition source: Princeton WordNet 3.0

Examples

  • he swung late on the fastball
  • he showed batters nothing but smoke

Meaning relationships

Synonyms: heater, smoke, hummer, bullet

Antonyms: none provided

Broader terms: pitch, delivery

Narrower terms: slider

History

Etymology

From fast (adjective) + ball.

Real reading context

fastball in complete knowledge articles