Word.ws English Dictionary

extra-duty

extra-duty adjective: describing a tennis ball having a thicker felt woven more loosely around the ball's core, designed for hard court surfaces such as asphalt or concrete.

Adjective

extra-duty (not comparable)

  1. Describing a tennis ball having a thicker felt woven more loosely around the ball's core, designed for hard court surfaces such as asphalt or concrete.
    • Coordinate term: regular-duty
    • The men at the U.S. Open use what is known as an “extra-duty” ball, which means the felt on the outside of the ball is woven slightly more loosely than the “regular-duty” ball the women use. […] Extra-duty balls are the balls of choice for outdoor hardcourts, like those at the U.S. Open, except...2022 September 6, Matthew Futterman, “The Great U.S. Open Ball Debate of 2022”, in The New York Times

Forms of extra-duty

alternative formextra duty

Questions about extra-duty

What does extra-duty mean?
Extra-duty means describing a tennis ball having a thicker felt woven more loosely around the ball's core, designed for hard court surfaces such as asphalt or concrete.
What part of speech is extra-duty?
Extra-duty is an adjective.

Words near extra-duty in the dictionary

  1. extra-atmospheric
  2. extra-biblical
  3. extra-conjugal
  4. extra-contractual
  5. extra-curricular
  6. extra-duty
  7. extra-factual
  8. extra-innings
  9. extra-Italian
  10. extra-label
  11. extra-large

Source and license

Adapted from Wiktionary: extra-duty (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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