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An indication is a sign — something you can see, hear, or notice — that points to what is happening, what is true, or what someone thinks or feels. A fever can be an indication of illness. A short, cold reply can be an indication that someone is upset, though you might be reading it wrong.
An indication一個indication是 is一個sign a sign——something你可以看到、聽到或注意到的東西 you can see, hear, or notice——that它指向 points to what is happening正在發生的事、what is true真實的情況，or someone thinks or feels或某人的想法或感受。A fever發燒 can be可以是 an indication of illness生病的一個跡象。A short, cold reply一個簡短冷淡的回覆 can be可以是 an indication that someone is upset某人不開心的一個跡象，though不過 you might be reading it wrong你也可能會解讀錯。
The word is a little formal; in speech people often just say sign, hint, or clue. You will also meet set phrases: there is every indication that… (it strongly seems that…); a clear indication; give no indication of… (not show at all).
The word這個字 is有點 a little formal正式；in speech在口語裡 people人們 often就 just say常常只說 sign, hint, or clue sign、hint 或 clue。You你 will also meet也還會遇到 set phrases一些固定用法：there is every indication that…有各種跡象顯示…（it strongly seems that…也就是很像是…）；a clear indication明顯的跡象；give no indication of…完全沒顯示出…（not show at all一點都沒表現出來）。
In medicine, indication can also mean a reason to use a treatment (“this drug’s indications”) — a more technical neighbour of the same idea: a pointer that something is so, or that something should be done.
In medicine在醫學上，indication indication 也可以指also can mean a reason to use a treatment使用某種治療的理由（"this drug's indications"「這個藥的適應症」）——a more technical neighbour是同一個概念更專業的鄰居 of the same idea：a pointer一個指標 that something is so顯示某件事是真的，or或 that something should be done顯示應該採取某個做法。
組成indicate（指出、顯示）+ -ion（做成名詞）。From Old French indication, from Latin indicātiō, from indicō (“point out, show”). By surface analysis, indicate + -ion.
同家族的字
- indicatethe verb: to point to or show
- indicatora thing that indicates — a light, a needle, a sign
- indicativeshowing or suggesting; also a grammar word
原始詞典資料7 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。
indicationnoun/ɪndɪˈkeɪʃən/
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An act of pointing out or indicating.
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A fact that shows that something exists or may happen.
- There's no indication that the fire was caused by criminals.
- All the indications point to drink-driving as the cause of the accident.
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rareA mark or another symbol used to represent something.
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A discovery made; information.
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obsoleteAn explanation; a display.
- For the indication either proceeds from one experiment to another; or else from experiments to axioms; which axioms themselves suggest new experiments.
- The committee, unknown to the workmen, also followed the next or succeeding mash, which was better made, and obtained the following results: First indication of the saccharometer .. 7⅘ degrees. Last indication of the saccharometer ... 1
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medicinesciencesAny symptom or occurrence in a disease that serves to direct to suitable remedies; the problem that warrants and prompts the use of a diagnostic test, imaging mode, or treatment (e.g., medication, surgical procedure).
- Influenza and suspected influenza are FDA-approved indications for oseltamivir.
- In the United States, major depressive disorder is an off-label indication for clomipramine, but in various other countries, it is an approved indication.
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businessfinanceA declared approximation of the price at which a traded security is likely to commence trading.
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。