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
quantum theory
1 ENTRIES FOUND:
quantum theory
(noun)
quantum theory
noun
quantum theory
noun
Britannica Dictionary definition of QUANTUM THEORY
[
noncount
]
physics
:
a theory in physics that is based on the idea that energy (such as light) is made of small separate units of energy
ASK THE EDITOR
Does 'namely' have the same meaning as 'named'?
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
emote
:
to express emotion in a very dramatic or obvious way
Learn More »