noun con·ver·sion \ kən-ˈvər-zhən , -shən \
|Updated on: 16 Aug 2018

Definition of conversion

1 : the act of converting : the process of being converted
2 : an experience associated with the definite and decisive adoption of a religion
3 a : the operation of finding a converse in logic or mathematics
b : reduction of a mathematical expression by clearing of fractions
4 : a successful attempt for a point or points especially after a touchdown or for a first down
  • a 2-point conversion
  • a third-down conversion
5 : something converted from one use to another


play \kən-ˈvərzh-nəl; -ˈvər-zhə-, -ˈvər-shnəl, -shə-nᵊl\ adjective

Examples of conversion in a Sentence

  1. The company is undergoing a conversion to a new computer system.

  2. They have suggested conversion of the old school into apartments.

  3. Conversion to gas heating will continue over the next few years.

  4. a conversion from Catholicism to Judaism

  5. He is thinking about conversion to Buddhism.

Recent Examples of conversion from the Web

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

Origin and Etymology of conversion

Middle English, from Anglo-French, from Latin conversion-, conversio, from convertere

CONVERSION Defined for English Language Learners


Definition of conversion for English Language Learners

  • : the act or process of changing from one form, state, etc., to another

  • : the act or process of changing from one religion, belief, political party, etc., to another

  • : a successful attempt at scoring extra points in rugby or American football

CONVERSION Defined for Kids


noun con·ver·sion \ kən-ˈvər-zhən \

Definition of conversion for Students

1 : the act of changing : the process of being changed
  • They've finished the conversion of the old school into an apartment building.
2 : a change of religion

Medical Dictionary


noun con·ver·sion \ kən-ˈvər-zhən, -shən \

medical Definition of conversion

1 : the transformation of an unconscious mental conflict into a symbolically equivalent bodily symptom

Law Dictionary


noun con·ver·sion \ kən-ˈvər-zhən \

legal Definition of conversion

1 a : the act of changing from one form or use to another
b : the act of exchanging one kind of property for another; especially : the act of exchanging preferred stocks or bonds for shares of common stock of the same company usually at a preset ratio or price and at a preset time
equitable conversion
: the constructive conversion of real property into personal property especially as a result of a contract for sale of land or testamentary instructions to sell real estate and divide the proceeds
Note: Equitable conversion is a legal fiction under which the seller of a real property becomes, upon the execution of a contract for the sale of the property, the owner of personal property in the form of legal title to the property that secures payment of the purchase price. The purchaser is deemed to be the holder of equitable title in and owner of the real property, having the rights and being subject to the liabilities that attend that status. In the case of a will in which a property owner authorizes the sale of real property and distribution of the proceeds, the property transforms into personalty by equitable conversion upon the owner's death.
involuntary conversion
: the conversion of property into other property as compensation for the theft, destruction, seizure, requisition, or condemnation of the original property
Note: For income tax purposes, involuntary conversions are generally taxable, and the gain or loss is computed by offsetting the basis of the property against the compensation received (as from insurance).
2 : the crime or tort of interfering with the ownership of another's movable or personal property without authorization or justification (as a lien) and especially of depriving the owner of use and possession — see also fraudulent conversion

Seen and Heard

What made you want to look up conversion? 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!


to oppose successfully

Get Word of the Day daily email!

Test Your Vocabulary

The Eponym Quiz

  • rubens-painting
  • Which is the best synonym of bowdlerize?
True or False

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


Test Your Knowledge - and learn some interesting things along the way.


Love words? Need even more definitions?

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