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in the lockup
lockup 是可数名词，指具体的一间拘留室；这里用 the 特指某个警察局的拘留所。
The suspect was held in the lockup overnight.
嫌疑人被关在拘留所里过了一夜。
（地方警察局的）拘留所；看守所
先理解核心含义，再看它在真实句子里的用法。
（地方警察局的）拘留所；看守所
a jail in a local police station
The suspect was held in the lockup overnight.
嫌疑人被关在拘留所里过了一夜。
车辆的一个或多个车轮因制动力矩过大而突然停止转动,导致受影响车轮打滑的状态
A condition in which one or more of a vehicle's wheels suddenly cease to rotate due to the application of excessive brake torque, causing the affected wheel(s) to skid.
系统停止响应输入的状态；死机。
A condition where a system stops responding to inputs; a freeze.
包含一个或多个徽标及可能相关文本的固定布局
A fixed layout involving one or more logos and possibly related text.
The suspect spent the night in a police lockup before the court hearing.
嫌疑人在法院听证前在警察局拘留所过了一夜。
They keep drunk drivers in the local lockup until they sober up.
他们把酒驾司机关在当地拘留所，直到他们清醒。
Visitors are not allowed inside the lockup for safety reasons.
出于安全原因，访客不得进入拘留所。
lockup 是可数名词，指具体的一间拘留室；这里用 the 特指某个警察局的拘留所。
The suspect was held in the lockup overnight.
嫌疑人被关在拘留所里过了一夜。
lockup 后可接 at 或 in 加地点；复数形式为 lockups。
There is a lockup at the local police station.
当地警察局有一个拘留所。
Not this
The police lockup the suspect overnight.
Use this
The police lock up the suspect overnight.
lockup 是名词，意为“拘留所”；表示“把……关起来”要用动词短语 lock up（分开写）。原句把名词 lockup 误当作动词，因此应改为动词短语 lock up。
Not this
The suspect was kept at lockup for two days.
Use this
The suspect was kept in lockup for two days.
表达“被关在拘留所”时，lockup 前要用介词 in，构成固定搭配 in lockup；at 通常指在某个地点或场所，而拘留所是拘禁场所，习惯用 in，所以把 at 改成 in。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
警察局拘留所
He spent the night in the police lockup before his court appearance.
他在出庭前在警察局拘留所待了一夜。
县看守所
The county lockup holds prisoners awaiting trial.
县看守所关押着等待审判的囚犯。
拘留室
The suspect was placed in a lockup cell at the station.
嫌疑人被关在警察局的拘留室里。
在拘留所里
He woke up in a lockup after the bar fight.
酒吧斗殴后，他在拘留所里醒来。
拘留设施
The new lockup facility can hold sixty detainees.
新的拘留设施可关押六十名被拘留者。
Use lockup naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
想象警察把嫌疑人“锁起来”(lock up)关进拘留所，lockup就是“锁起人来的地方”。
语域：informal 常见场景：police stations、news reports about arrests “lockup”表示“地方警察局的拘留所”时属非正式（口语）用法，多用于日常交谈或新闻报道；正式书面或法律文件中通常改用“jail”或“detention center”。
这些词都以 -up 结尾，末音节都是不重读的 /ʌp/，但它们与 lockup /ˈlɒkʌp/ 不押韵，因为重读元音不同：pickup /ɪ/、backup /æ/、checkup 和 setup /e/、cleanup /iː/、markup /ɑː/。只有重读部分为 /ɒkʌp/ 的词（如短语 stock up）才与 lockup 押韵。
Dictionary facts from ECDICT, WIKTIONARY.