d

noun, often capitalized, often attributive
\ ˈdē How to pronounce d (audio) \
plural d's or ds\ ˈdēz How to pronounce d (audio) \

Definition of d

 (Entry 1 of 6)

1a : the 4th letter of the English alphabet Her middle initial is d.
b : a graphic representation of this letter a half moon in the shape of a d
c linguistics : the speech sound that the written letter d represents : a speech counterpart of orthographic d
2 Roman numerals : five hundred — see Table of Numbers
3 music : the second tone of a C-major scale (see scale entry 5 sense 1) in the key of d
4 : a graphic device for reproducing the letter d the d on my computer keyboard
5 : one designated d especially as the fourth in order or class option d
6 education
a : a grade rating a student's work as poor in quality got a d on the test
b : one graded or rated with a D
7 : something shaped like the letter D specifically : a semicircle on a pool table about 23 inches in diameter for use especially in snooker
8 capitalized, sports
a : defense sense 2b play tough D

Definition of d (Entry 2 of 6)

1 date
2 daughter
3 day
4 dead; deceased
5 deci-
6 degree
7 [Latin denarius, denarii] penny; pence
8 depart; departure
9 diameter
10 differential
11 dimensional
12 distance
13 dorsal
14 down (see down entry 5 sense 6)
15 drive; driving

Definition of D (Entry 3 of 6)

1 Democrat
2 derivative
3 dollar
4 Dutch

Definition of D (Entry 4 of 6)

deuterium

d-

prefix
\ ˌdē, ˈdē \

Definition of d- (Entry 5 of 6)

1 : dextrorotatory d-tartaric acid
2 : having a similar configuration at a selected carbon atom to the configuration of dextrorotatory glyceraldehyde usually printed as a small capital d-fructose

Definition of -d (Entry 6 of 6)

used after the figure 2 or 3 to indicate the ordinal number second or third 2d53d

Examples of d in a Sentence

Noun Many people who are learning to read confuse b's and d's. names that start with d The song is in the key of D. She got a D on her chemistry test.
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First Known Use of d

Noun

before the 12th century, in the meaning defined at sense 1a

History and Etymology for d

Prefix

International Scientific Vocabulary, from dextr-

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Time Traveler for d

Time Traveler

The first known use of d was before the 12th century

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Statistics for d

Cite this Entry

“D.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/d. Accessed 2 Mar. 2021.

Style: MLA
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More Definitions for d

d

noun

English Language Learners Definition of d

: the fourth letter of the English alphabet
: a musical note or key referred to by the letter D : the second tone of a C-major scale
: a grade that is given to a student for doing poor work

d

noun, often capitalized
\ ˈdē How to pronounce d (audio) \
plural d's or ds\ ˈdēz \

Kids Definition of d

1 : the fourth letter of the English alphabet
2 : 500 in Roman numerals
3 : a grade that shows a student's work is poor
4 : a musical note referred to by the letter D

Kids Definition of d.

1 day
2 dead
3 deceased
4 penny

Medical Definition of d

 (Entry 1 of 3)

1 dalton
2 date
3 daughter
4 day
5 dead
6 deceased
7 deciduous
8 degree
9 density
10 developed
11 deviation
12 dexter
13 diameter
14 died
15 diopter
16 disease
17 divorced
18 dorsal
19 dose
20 duration

D

symbol

Medical Definition of D (Entry 2 of 3)

deuterium

d-

prefix
\ ˌdē, ˈdē \

Medical Definition of d- (Entry 3 of 3)

1 : dextrorotatory usually printed in italic d-tartaric acid
2 : having a similar configuration at a selected carbon atom to the configuration of dextrorotatory glyceraldehyde usually printed as a small capital D-fructose

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Legal Definition of D

1 district
2 defendant

More from Merriam-Webster on d

Nglish: Translation of d for Spanish Speakers

Comments on d

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