noun, often capitalized, often attributive
\ ˈjā How to pronounce j (audio) \
plural j's or js\ ˈjāz How to pronounce j (audio) \

Definition of j

 (Entry 1 of 3)

1a : the 10th letter of the English alphabet
b : a speech counterpart of orthographic j (as j in jump)
2a : a graphic device for reproducing the letter j
b : a unit vector parallel to the y-axis
3 : one designated j especially as the 10th in order or class
4 : something shaped like the letter J
5 J, plural J's or Js, basketball, informal : jump shot … she flicked a pass to the corner, where Lawson nailed a J to tie the game at 51.— Hank Hersch

Definition of j (Entry 2 of 3)

1 jack
2 journal
3 judge; justice

Definition of J (Entry 3 of 3)


Examples of j in a Sentence

Noun a word that begins with a j a word that begins with j

First Known Use of j


15th century, in the meaning defined at sense 1a

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Time Traveler for j

Time Traveler

The first known use of j was in the 15th century

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Statistics for j

Cite this Entry

“J.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/j. Accessed 12 May. 2021.

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More Definitions for j



English Language Learners Definition of j

: the 10th letter of the English alphabet


noun, often capitalized
\ ˈjā How to pronounce j (audio) \
plural j's or js\ ˈjāz \

Kids Definition of j

: the tenth letter of the English alphabet



Medical Definition of J

mechanical equivalent of heat

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Legal Definition of J.

1 judge
2 justice
3 judgment

More from Merriam-Webster on j

Nglish: Translation of j for Spanish Speakers

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