j

noun, often capitalized, often attributive
\ˈjā \
plural j's or js\ˈjāz \

Definition of

(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

j

abbreviation (1)

Definition of (Entry 2 of 3)

1 jack

2 journal

3 judge; justice

J

abbreviation (2)

Definition of (Entry 3 of 3)

joule

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

Noun

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

Keep scrolling for more

Learn More about j

Dictionary Entries near j

Iztapalapa

izzard

izzat

j

J

j'accuse

j'adoube

Statistics for j

Look-up Popularity

Time Traveler for j

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

See more words from the same century

Keep scrolling for more

More Definitions for j

j

noun

English Language Learners Definition of j

: the 10th letter of the English alphabet

j

noun, often capitalized
\ˈjā \
plural j's or js\ˈjāz \

Kids Definition of j

: the tenth letter of the English alphabet

J

symbol

Medical Definition of

mechanical equivalent of heat

Keep scrolling for more

Legal Definition of J. 

1 judge

2 justice

3 judgment

Keep scrolling for more

More from Merriam-Webster on j

Rhyming Dictionary: Words that rhyme with j

Spanish Central: Translation of j

Nglish: Translation of j for Spanish Speakers

Comments on j

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

WORD OF THE DAY

having a pattern of small flowers

Get Word of the Day daily email!

Test Your Vocabulary

Find the Cousins

  • a-large-tree-with-many-branches
  • Which pair shares a common word ancestor?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Syn City

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!