quantum theory

noun
Updated on: 14 Nov 2017

Definition of quantum theory

1 :a theory in physics based on the concept of the subdivision of radiant energy into finite quanta and applied to numerous processes involving transference or transformation of energy in an atomic or molecular scale

Recent Examples of quantum theory from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'quantum theory.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of quantum theory

1912


QUANTUM THEORY Defined for English Language Learners

quantum theory

noun

Definition of quantum theory for English Language Learners

  • physics : a theory in physics that is based on the idea that energy (such as light) is made of small separate units of energy


Medical Dictionary

quantum theory

noun

medical Definition of quantum theory

:a theory in physics based on the concept of the subdivision of radiant energy into finite quanta and applied to numerous processes involving transference or transformation of energy in an atomic or molecular scale


Seen and Heard

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

Love words? Need even more definitions?

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

WORD OF THE DAY

to praise usually to excess

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?
True or False

Test your knowledge - and maybe learn something along the way.

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!