not clear in a person’s mind （思想上）不清楚的，含糊的，不明確的，模糊的 to have a vague impression/memory/recollection of something 對某事印象／記憶模糊 They had only a vague idea where the place was. 他們只是大概知道那個地方的位置。
Extra ExamplesI am vague about what happened during the rest of the night. 我不太清楚那天晚上後來發生了什麽。 I have a vague recollection of meeting him when I was a child. 我依稀記得小時候曾見過他。
Oxford Collocations Dictionaryverbs- be
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not having or giving enough information or details about something 不具體的；不詳細的；粗略的 She's a little vague about her plans for next year. 她對她明年的計劃還不太確定。 The politicians made vague promises about tax cuts. 政界人物的減稅承諾言辭含混。 He was accused of being deliberately vague. 他被指責爲故意含糊其詞。 We had only a vague description of the attacker. 我們只有那個襲擊者的粗略描述。 He outlined the policy in vague terms. 他含糊地概述了這項政策。
Extra ExamplesHer directions were hopelessly vague. 她的指示籠統得令人無所適從。 It was a vague enough concept for the liberals to unite around. 對自由主義者而言，團結起來是一個不夠明確的概念。 It was a vague enough suggestion for everyone to be happy with it. 這條建議措辭隐晦圓通，每個人聽了都美滋滋的。 Since the officers knew little themselves their reassurances were necessarily vague. 這些官員自己都不明就裏，他們的保證自然空洞浮泛。 The identity of the city in the novel is deliberately left vague. 小說故意含糊其詞，沒有交待到底是哪座城市。 The law is notoriously vague on this point. 衆所周知，法律對這一點的規定非常籠統。 The statement was vague in its wording. 這份聲明措辭含糊。 You're being deliberately vague. 你是故意含糊其詞。 an inherently vague and subjective concept 本質上空泛而主觀的概念 I was suitably vague as to exactly how I had acquired the money. 對於我究竟是如何弄到這筆錢的，我沒有明確說明。
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(of a person’s behaviour 人的行爲 suggesting a lack of clear thought or attention 茫然的；糊塗的；心不在焉的 His vague manner concealed a brilliant mind. 他大智若愚。 She seems to be getting rather vague as she grows older. 她好像随着年紀增長變得有些糊塗了。
Oxford Collocations Dictionaryverbs- be
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not having a clear shape 不清楚的；模糊的；朦胧的 More Like This Silent lettersSilent letters
Word Originmid 16th cent.: from French, or from Latin vagus ‘wandering, uncertain’.