n.[U][C]

1. 變化；轉變；變形；變質
   There was a noticeable transformation in his appearance.

   他的容貌有了明顯的變化。

2. 【電】變換，轉換
3. 【數】變換（式）
4. 【核】轉換
5. 【文】轉換
6. 【生】變態，轉化
7. （女人用的）假髮

n.

1. a marked change in nature, form, or appearance.
2. Mathematics  & Logic  a process by which a figure, expression, or function is converted into another one of similar value.
3. Linguistics  a process by which an element in the underlying logical deep structure of a sentence is converted to an element in the surface structure.
4. Biology  the transfer of genetic information between different species of bacteria, especially by a plasmid.