Showing a picture with a lot of fine detail, so that the image looks sharp and clear instead of soft and blurry. It is used about televisions, screens, cameras, video, and pictures.

with a lot of fine detail帶著大量細節地 Showing a picture顯示畫面，so that讓 the image影像 looks sharp and clear看起來銳利清晰，instead of soft and blurry而不是軟糊模糊。It is used about它用來說 televisions電視、screens螢幕、cameras相機、video影片 and pictures和圖像。

'Definition' here does not mean the meaning of a word — it is an older, technical use meaning how clearly the edges and small details of an image can be seen. Technically it means the screen or the video is made of a very large number of tiny dots, so the small things stay clear.

'Definition' here這裡的 'Definition' does not mean不是指 the meaning of a word字詞的「定義」——it is它是 an older, technical use較舊的技術用法，meaning指的是 an image影像 the edges and small details的邊緣和小細節 how clearly can be seen能被看得多清楚。Technically技術上 it means它指的是 the screen or the video螢幕或影片 is made of由 a very large number of tiny dots非常大量的小點組成，so所以 the small things小東西 stay clear保持清楚。

Almost everyone shortens it to HD, and in speech HD is far more common than the full words: 'Is it in HD?' It works as an adjective before a noun — a high-definition television, high-definition video — and you will also see it written as one word or as HD.

Almost everyone幾乎所有人 shortens it to HD都把它縮成 HD，and in speech而在口語裡，HD than the full words比起完整字詞 is far more common常見得多：'Is it in HD?'「這是 HD 的嗎？」It works as an adjective它可以當形容詞 before a noun放在名詞前——a high-definition television、high-definition video——and you will also see it written你也會看到它寫成 as one word一個字，or as HD或寫成 HD。

Note that the word is a moving target: what counted as high-definition fifteen years ago is ordinary now, and shops have moved on to '4K' and 'Ultra HD' to mean the newest, sharpest kind. People also use it playfully outside technology, about anything seen in painful detail: 'I saw every wrinkle in high definition.'

Note that注意，the word is a moving target這個字是會移動的靶：what counted as high-definition fifteen years ago十五年前算得上 high-definition 的東西，is ordinary now現在很普通，and shops have moved on而店家已經往前走，to '4K' and 'Ultra HD'改用 '4K' 和 'Ultra HD'，to mean來指 the newest, sharpest kind最新、最清晰的那一種。People also use it playfully人們也會拿它開玩笑，outside technology用在科技之外，about anything seen in painful detail說任何被看得清楚到扎眼的東西：'I saw every wrinkle in high definition.'「每一條皺紋我都在高畫質下看見了。」