1. alteration: a change in the nature, form, or function of something a conversion of waste land into a sports field
2. something altered: something that has been changed in nature, form, or function, especially a building or room These apartments are conversions.
3. change of measuring system: a change from one measuring or calculating system to another, or a calculation done to bring about the change the conversion from miles to kilometers
4. changing of somebody's beliefs: an adoption of new opinions or beliefs, especially in religion his conversion to Islam
5. football converting following touchdown: in football, a successful kick between the goal posts or a run or pass into the end zone following a touchdown
6. logic reversing terms in categorical sentence: the reversing of the subject and predicate in a categorical sentence, forming a new sentence, e.g. "all dogs are collies" from "all collies are dogs"
7. criminal law unlawful holding of another's property: unlawful treating of somebody else's property as your own
8. commercial law changing of property classification: the changing of one type of property to another, e.g. from joint to separate property
[14th century. Via French< Latin conversion-< convers-, past participle of convertere (see convert)]