/kən'vɜ:ʃn; [US] kən'vɜ:rʒn; kən`vɝʒən/
n ~ (from sth) (into/to sth)
1 [U] converting or being converted 转变; 变换
*the conversion of a barn into a house, of pounds into dollars 仓房之改建为寓所、英镑之兑换成美元
* Conversion to gas central heating will save you a lot of money. 改用煤气集中供暖将节省大笔开支.
* [attrib 作定语] a metric conversion table, ie showing how to change metric amounts into or out of another system, by calculation 公制换算表.
2 [C] instance of this 转变
*a building firm which specializes in house conversions, eg converting large houses into several flats 专营改建房屋的建筑公司（如将大房屋改建为几个单元者）
* He kicked a penalty goal and two conversions, ie in Rugby football. 他一次罚球得分, 两次触地後射门得分（在橄榄球赛中）.
* He used to support monetarist economics, but he underwent quite a conversion (ie changed his opinion) when he saw how it increased unemployment. 他一向赞同货币经济理论, 然而当他看到这种理论加重了失业现象之後, 他彻底改变了看法.

n [U and C]
[Date: 1300-1400; Language: Old French;Origin:Latin conversio, from convertere; CONVERT¹]
when you change something from one form, purpose, or system to a different one
conversion into
　The warehouse was undergoing conversion into apartments.
conversion of
　the conversion of waste into usable products
conversion to
　The British conversion to the metric system took place in the 1970s.
house/barn/loft etc conversion
BrE (=when you change the use of a house, barn etc, so that it becomes apartments, a house, a room etc)
when someone changes from one religion or belief to a different one
conversion to
　a conversion to vegetarianism
conversion from
　Newman's conversion from Anglicanism to Catholicism
a way of scoring extra points in rugby or American football