- a change or adaptation in form, character, or function
- something changed in one of these respects
- a change to another attitude or belief, as in a change of religion
- a change in the units or form of a number or expression: the conversion of miles to kilometres involves multiplying by 1.61
- a form of inference by which one proposition is obtained as the converse of another proposition
- unauthorized dealing with or the assumption of rights of ownership to another's personal property
- the changing of real property into personalty or personalty into realty
- a score made after a try by kicking the ball over the crossbar from a place kick
- a change of fertile material to fissile material in a reactor
- an alteration to a car engine to improve its performance
WordReference Random House Learner's Dictionary of American English © 2026
con•ver•sion /kənˈvɜrʒən, -ʃən/USA pronunciation
n.
WordReference Random House Unabridged Dictionary of American English © 2026- the act or process of converting or the state of being converted:[uncountable]chemical conversion.
- change from one belief, etc., to another: [countable]a political conversion from one party to another.[uncountable]People doubt the sincerity of his conversion to supply-side economics.
- a change of one kind of component for another:[uncountable]conversion from oil heat to gas heat.
- Sport[countable] the making of an additional score in football or basketball.
con•ver•sion
(kən vûr′zhən, -shən),USA pronunciation n.
con•ver′sion•al, con•ver•sion•ar•y
(kən vûr′zhə ner′ē, -shə-),USA pronunciation adj.
- Philosophythe act or process of converting; state of being converted.
- change in character, form, or function.
- Religionspiritual change from sinfulness to righteousness.
- change from one religion, political belief, viewpoint, etc., to another.
- a change of attitude, emotion, or viewpoint from one of indifference, disbelief, or antagonism to one of acceptance, faith, or enthusiastic support, esp. such a change in a person's religion.
- Physicsa physical transformation from one material or state to another:conversion of coal, water, and air into nylon.
- the act of obtaining equivalent value, as of money or units of measurement, in an exchange or calculation:conversion of francs into dollars.
- a physical, structural, or design change or transformation from one state or condition to another, esp. to effect a change in function:conversion of a freighter into a passenger liner.
- a substitution of one component for another so as to effect a change:conversion from oil heat to gas heat.
- Mathematicsa change in the form or units of an expression.
- Philosophy[Logic.]the transposition of the subject and predicate of a proposition, as "No good man is unhappy'' becomes by conversion "No unhappy man is good.''
- Law
- unauthorized assumption and exercise of rights of ownership over personal property belonging to another.
- change from realty into personalty, or vice versa, as in the sale or purchase of land or mining coal.
- Sport[Football.]a score made on a try for a point after touchdown by place-kicking or drop-kicking the ball over the bar between the goalposts or by completing a pass in or running the ball into the end zone.
- Psychiatrythe process by which a repressed psychic event, idea, feeling, memory, or impulse is represented by a bodily change or symptom.
- Physicsthe production of radioactive material in a process in which one nuclear fuel is converted into another by the capture of neutrons. Cf. breeding (def. 6).
- Computing
- the process of changing software designed to run on one computer system to run on another.
- the change from an existing computer system to a new computer system.
- the act of transferring or copying data stored on one storage medium to another storage medium.
- the process of changing the base that a number or numbers are written in.
- Printingthe transformation of material from a form suitable for printing by one process to a form suitable for another process:a halftone gravure conversion.
- Latin conversiōn- (stem of conversiō) a complete change. See converse2, -ion
- Anglo-French)
- Middle English conversio(u)n (1300–50
Collins Concise English Dictionary © HarperCollins Publishers::
conversion /kənˈvɜːʃən/ n
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