preconceived idea/notion about sth
She had no preconceived ideas about the city before visiting.
她来访之前对这座城市没有任何先入为主的看法。
预想的；先入为主的
事先形成的:提前构想的。
formed or decided in advance, especially without evidence or because of prejudice
事先形成的:提前构想的。
Conceived beforehand: formed ahead of time.
She tried to approach the debate without any preconceived opinions.
她试图不带任何先入为主的看法来参与这场辩论。
用法提示：preconceived 作定语修饰 opinions，表示事先形成的、先入为主的。
His preconceived ideas about the city changed after he visited it.
他关于这座城市的先入为主的观念在参观之后改变了。
用法提示：preconceived 作定语修饰 ideas，强调未经实际了解就形成的想法。
It is important to set aside your preconceived notions and listen to the evidence.
重要的是放下你先入为主的观念，去倾听证据。
用法提示：preconceived 作定语修饰 notions，指没有依据就预先形成的看法。
She had no preconceived ideas about the city before visiting.
她来访之前对这座城市没有任何先入为主的看法。
He rejected the preconceived notion that older workers are less productive.
他拒绝接受“年纪较大的员工效率更低”这种先入为主的观念。
preconceived 是形容词，通常放在名词前，常与 idea、notion、opinion 搭配，表示“未经了解就形成的”，多含贬义。
Try not to form preconceived opinions of people based on their appearance.
尽量不要以外表为依据对人形成先入为主的看法。
比 preconceived 更强调负面立场或歧视色彩；a prejudiced view 可替换 a preconceived view，但 prejudiced 不一定表示“事先形成”，而常表示主观上的不公正。
侧重立场偏向或偏袒，可能源于利益或情感而非“先入为主”；preconceived 强调观点形成在先且缺乏证据，biased 强调结论不公正，二者并非处处可互换。
更强调“在了解事实前就作出判断”，常用于 a prejudged outcome 或 be prejudged；与 preconceived 相比动作性更强，且常含草率、不公的意味。
侧重“事先定好、不可更改”，未必带偏见或证据不足的含义；如 a predetermined conclusion 可替换 a preconceived conclusion，但语气更中性、更强调既定安排。
grammar · medium
易错句子I preconceived that she would not agree.
正确表达I had a preconceived idea that she would not agree.
preconceived 是形容词（先入为主的），不是动词；表示‘事先认为’应使用 had a preconceived idea/notion 或动词 preconceive（但极少用）。原句把形容词当动词用，语法错误。
grammar · medium
易错句子He is preconceived against people from other countries.
正确表达He is prejudiced against people from other countries.
preconceived 形容的是‘想法/观点’事先形成，不能指人对某群体有偏见；描述‘有偏见的’应用 prejudiced。原句混淆了词义和搭配。
grammar · medium
易错句子She has a preconceived about him.
正确表达She has a preconceived idea about him.
preconceived 是形容词，必须后接名词（如 idea、notion、opinion）一起作宾语；原句缺少被修饰的名词，导致句子不完整。
针对“先入为主的”这一义项，指不因预先形成的想法而偏袒某一方，愿意根据事实判断。
指不固守预想或成见，愿意接纳新的观点和证据。
指不受个人预想、情感或偏见影响，以事实为依据。
指没有预先偏向某一边，对各方一视同仁。
preconceived 是形容词，修饰想法或意见；preconception 是名词，直接作主语或宾语，不能像形容词一样放在名词前。
preconceived 指想法在了解情况之前就已形成，未必含敌意；prejudiced 指对人或群体抱有不公平的成见，带有明显的负面情感。
先入为主的观念
She approached the task with no preconceived ideas about how it should be done.
她着手这项任务时，对应该如何完成没有任何先入为主的观念。
先入之见；成见
The research challenged many preconceived notions about language learning.
这项研究挑战了许多关于语言学习的先入之见。
先入为主的看法
Try to form your own judgment without relying on preconceived opinions.
试着不依赖先入为主的看法，形成自己的判断。
先入为主的观点
He listened to the proposal with an open mind, setting aside his preconceived views.
他抛开先入为主的观点，以开放的心态听取了这项提议。
pre- (before) + conceiv(e) (to form in mind) + -ed (adjective suffix) | Related: preview, predict, concept, perceive
常与 preconceived 搭配，指未经审视就形成的观念。
preconceived idea 指事先形成的、可能未经检验的想法。
preconceived opinion 指事先形成且常带偏见的看法。
与 preconceived 相近，指没有充分证据就接受的设想。
一种典型的先入为主的看法，常因缺乏了解而产生。
先入为主的观念
She had no preconceived notions about her new colleagues.
她对她的新同事没有任何先入为主的看法。
先入为主的想法
Try to listen to the proposal without any preconceived ideas.
试着不带任何先入为主的想法来听这个提议。
先入为主的观念是智慧之门上的锁。
She tried to approach the issue without any preconceived notions.
她试图不带任何先入为主的观念来处理这个问题。
Dictionary facts from ECDICT, WIKTIONARY.