variants often Y
plural y's or ys ˈwīz How to pronounce y (audio)
often attributive
1
a
: the 25th letter of the English alphabet
b
: a graphic representation of this letter
c
: a speech counterpart of orthographic y
2
: a graphic device for reproducing the letter y
3
: one designated y especially as the 25th in order or class or the second in order or class when x is made the first
4
: something shaped like the letter Y

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Words Starting With Y

Browse 1,528 words and phrases that start with the letter Y, from yaba bark to Y-worm.

Examples of y in a Sentence

a word that starts with a y a word that starts with y

Word History

First Known Use

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

Time Traveler
The first known use of y was before the 12th century

Browse Nearby Words

Cite this Entry

“Y.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/y. Accessed 12 Jun. 2026.

Kids Definition

y

1 of 6 noun
ˈwī
plural y's or ys
often capitalized
: the 25th letter of the English alphabet

Y

2 of 6 noun
ˈwī
1
: ymca
2
: ywca

-y

3 of 6 adjective suffix
variants also -ey
ē
-ier; -iest
1
a
: marked by : full of
blossomy
dirty
muddy
clayey
b
: composed of
icy
waxy
c
: like : like that of
homey
wintry
stagy
2
a
: tending to
sleepy
chatty
b
: causing or performing (a certain) action
teary

-y

4 of 6 noun suffix
ē
plural -ies
1
: state : condition : quality
jealousy
2
: activity, place of business, or goods dealt with
grocery
laundry
3
: whole body or group
soldiery

-y

5 of 6 noun suffix
plural -ies
: instance of a (certain) action
entreaty
inquiry

-y

6 of 6
see -ie
Etymology

Old English -ig (adjective suffix) "having the character of"

derived from Greek -ia (noun suffix) "state, condition, quality"

derived from Latin -ium (noun suffix) "an instance of a certain action"

Medical Definition

Y

symbol
yttrium

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