The Britannica Dictionary
mobile search
Home
Ask the Editor
Word of the Day
Quizzes
Core Vocabulary
Browse the Dictionary
×
Britannica Homepage
Ask the Editor
Word of the Day
Quizzes
Core Vocabulary
Browse the Dictionary
The Britannica Dictionary
Pluto
1 ENTRIES FOUND:
Pluto
(noun)
Pluto
/
ˈ
pluːtoʊ/
noun
Pluto
/
ˈ
pluːtoʊ/
noun
Britannica Dictionary definition of PLUTO
[
singular
]
:
the object in our solar system that in the past was thought to be the planet farthest from the sun but that is no longer considered to be a planet
ASK THE EDITOR
When should I use
don't
and
doesn't
?
See the answer »
QUIZZES
Vocabulary Quiz
Test your word power
Take the Quiz »
Name That Thing
Take our visual quiz
Test Your Knowledge »
WORD OF THE DAY
contagious
:
able to be passed from one person or animal to another
Learn More »
