把一物變成另一物
最字面、最一般的一支：東西的形式、用途或系統被轉換掉。
changing form · noun · C2
The act of changing something into a different form, purpose, or system.
轉換；改建
核心畫面
Picture something being turned right around so it comes out as a different thing — an attic becomes a bedroom, dollars become euros, one form flips into another.
可以想成把一樣東西整個「轉過去」，出來就變成另一種樣子：閣樓改成臥房、美金換成歐元、一種形式翻成另一種形式。核心比較…更多收起
可以想成把一樣東西整個「轉過去」，出來就變成另一種樣子：閣樓改成臥房、美金換成歐元、一種形式翻成另一種形式。核心比較像這個「轉換、變成別的」的動作。From the word’s history
From Latin convertere 'to turn around, transform' — con- 'together' + vertere 'to turn'. Every sense keeps that literal 'turn one thing into another': change of form, turning to a new faith, turning a try into points.
來自拉丁文 convertere「轉過去、變換」，con-（一起）＋ vertere（轉）。所有意思都守著「把一樣東西轉成另一樣」這個字面動作：改變形式、轉向新的信仰、把達陣轉換成分數。
etymonline.com/word/conversion
Three branches
轉向新的信仰
把「轉換」用在一個人的內心：整個人生方向掉頭，從原本的信仰轉向另一個。這其實是這個字最早的用法。
changing religion · noun · C2
The act of changing from one religion or set of beliefs to another.
改變信仰；皈依
達陣後的追加得分
橄欖球和美式足球裡的固定術語：把已經達陣的機會「轉換」成實際分數，一樣是 A 轉成 B。
extra-point score (rugby) · noun · C2
In rugby or American football, a kick or play that scores extra points after a try or touchdown.
追加得分（達陣後加踢）
原始詞典資料13 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
conversionnoun/kənˈvɜːʃ(ə)n/
- 1
The act of converting something or someone.
- His conversion to Christianity
- The conversion of the database from ASCII to Unicode
- 2
computingengineeringmathematicsA software product converted from one platform to another.
- Mike Follin […] also programmed the Spectrum version of The Sentinel (97%, Issue 40), and the excellent coin-op conversions Bubble Bobble (90%, Issue 45) and Bionic Commando (92%, Issue 53).
- 3
chemistrynatural-sciencesphysical-sciencesA chemical reaction wherein a substrate is transformed into a product.
- 4
ball-gamesgameshobbiesA free kick, after scoring a try, worth two points.
- 5
American-footballball-gamesfootballAn extra point (or two) scored by kicking a field goal or carrying the ball into the end zone after scoring a touchdown.
- 6
businessmarketingAn online advertising performance metric representing a visitor performing whatever the intended result of an ad is defined to be.
- 7
lawUnder the common law, the tort of the taking of someone's personal property with intent to permanently deprive them of it, or damaging property to the extent that the owner is deprived of the utility of that property, thus making the tortfeasor liable for the entire value of the property.
- the conversion of a horse
- Or bring my action of conversion / And trover for my goods.
- 8
Living space in a part of a building that was previously uninhabitable, or the process of constructing such living space.
- a loft conversion
- He might even sleep informally: in his vehicle, in a garage-conversion apartment, or beneath a freeway overpass, any of which would be rendered part of the informal landscape by his very act of sleeping.
另外 5 個記錄的用法
- 9
human-scienceslinguisticssciencesThe process whereby a new word is created without changing the form, often by allowing the word to function as a new part of speech.
- 10
obsoleteThe act of turning round; revolution; rotation.
- 11
human-scienceslogicmathematicsThe act of interchanging the terms of a proposition, as by putting the subject in the place of the predicate, or vice versa.
- 12
mathematicssciencesA change or reduction of the form or value of a proposition.
- the conversion of equations; the conversion of proportions
- 13
slangChanging a miniature figure into another character, usually by mixing different parts, or molding the model's parts, or doing both.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。