| 释义 |
 | 一1 | | yī | 数副介助 | | | 1 one: | | | 一万一 eleven thousand | | | 一匹马 a horse | | | 一瓶牛奶 one bottle of milk |
| 2 first: | | | 一级 of first rate | | | 一路车 No. 1 bus | | | 一营一连 First Company of the First Battalion |
| 3 single; alone; only one: | | | 一枪就打中了目标 hit the target with a single shot | | | 你一个人行吗？ Can you manage all by yourself? |
| 4 same: | | | 一根藤上的苦瓜 bitter gourds from the same vine—people with a similar bitter past | | | 意见不一。 Opinions differ. | | | 这不是一码事。 This is another pair of shoes. | | | 这姑娘跟她妈妈一个模样。 The girl is the image of her mother. |
| 5 whole; all; throughout: | | | 一冬 the whole winter; all winter; throughout the winter | | | 他一脸的土。 His face was covered with dust. | | | 一包在内花了二百块钱。 I spent 200 yuan, fares, hotel, meals all included. | | | 一屋子的人都欢腾起来。 Everybody in the house was overjoyed. |
| 6 every time: | | | 大家一提起那艰苦创业的日子，总有说不完的话。 Every time we talk about the hard pioneering days, we have so much to say that we can't get it all out. |
| 7 also; otherwise: | | | 汞溴红一名红汞。 Merbromin is also known as mercurochrome. |
| 8 concentrated; wholehearted: | | | 专心一意 single-minded; concentrated |
| 9 [indicating that the action occurs just once or lasts for a short time] |
| | | a [in the middle of a reduplicated verb]: | | | 等一等 wait a bit | | | 歇一歇 have a rest | | | 笑一笑 give a smile |
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| | | b [between a verb and a verbal measure]: | | | 咳一声 give a cough | | | 瞧一眼 take a look | | | 咬一口 take a bite | | | 打他一巴掌 give him a slap |
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| 10 [before a verb or a verbal measure to indicate an action to be followed by a result]: | | | 一查到底 investigate fully | | | 一跳跳了过去 get over in one jump | | | 经他这么一说，大家又都有信心了。 His words restored our confidence. | | | 医生一检查，果然是肺炎。 The doctor's check-up confirmed that it was pneumonia. |
| 11 [before a verb or an adjective, indicating the suddenness or thoroughness of an action or a change in the situation]: | | | 那马猛然一惊，直立起来。 All of a sudden the horse shied and reared in fright. | | | 这部电影值得一看。 This movie is well worth seeing. |
| II 副 once; as soon as: | | | 他一回来我就告诉他。 I will tell him as soon as he comes back. |
| III 介 per; a: | | | 一班十个人 ten in a class | | | 一小时六十公里 (at) 60 kilometres per hour |
| IV 助 〈书〉 [before certain words for emphasis]: | | | 事态之严重一至于此！ To think that things should have come to such a pass! | | | 吏呼一何怒，妇啼一何苦。 (杜甫《石壕吏》) The officer's shouting, how angry it was; | The woman's cry, how mournful and bitter! |
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| 一2 | | yī | 名 | | | 名 【乐】 note of the scale in gongchepu (工尺谱)，corresponding to 7 in numbered musical notation |
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