1
a caucus of [people]
名词用法：a caucus of ... 表示由某类人参加的核心会议。
A caucus of party leaders was held to choose the candidate.
召开了一次党的领导人的核心会议，以选择候选人。
核心会议；领导人会议
先理解核心含义，再看它在真实句子里的用法。
核心会议；领导人会议
a closed political meeting
A caucus of party leaders was held to choose the candidate.
召开了一次党的领导人的核心会议，以选择候选人。
领导人会议；核心会议；开核心会议
n. a closed political meeting；v. meet to select a candidate or promote a policy
The party's caucus met behind closed doors to choose its next leader.
该党的核心会议闭门召开，以选出下一任领导人。
State caucuses help decide which candidates appear on the primary ballot.
各州的核心会议有助于决定哪些候选人能出现在初选选票上。
The senators caucused for hours before agreeing on a tax bill.
参议员们召开核心会议磋商了数小时，才就一项税收法案达成一致。
名词用法：a caucus of ... 表示由某类人参加的核心会议。
A caucus of party leaders was held to choose the candidate.
召开了一次党的领导人的核心会议，以选择候选人。
动词用法：caucus 是不及物动词，与 with 连用表示与某人开会。
The senators caucused with the governor before the vote.
参议员们在投票前与州长举行了核心会议。
动词用法：caucus 后接不定式表示开会的目的。
They caucused to agree on a new policy.
他们召开核心会议以就新政策达成一致。
Not this
The party held caucus to select a candidate.
Use this
The party held a caucus to select a candidate.
caucus 作名词时是可数名词，表示“一次核心会议”，前面需要加冠词 a/an 或使用复数。中文里常说“开核心会议”，容易忽略量词，导致漏掉 a。
Not this
The committee caucused the new policy.
Use this
The committee caucused on the new policy.
caucus 作动词时是不及物动词，表示“开核心会议”，不能直接接宾语；要接话题时需加介词 on 或 about，或者改用 discuss 等及物动词。
Not this
Many caucus were held in Iowa.
Use this
Many caucuses were held in Iowa.
caucus 的复数形式是 caucuses，在词尾加 -es。中文的“许多核心会议”没有明显的复数标记，学习者容易误用原形，但英语中复数要变形。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
政党核心会议
The party caucus met to choose a new chair.
政党核心会议开会选举新的主席。
举行核心会议
Senators held a caucus to discuss the bill.
参议员们举行核心会议讨论这项法案。
艾奥瓦州党团会议
The Iowa caucus is the first major contest in the primaries.
艾奥瓦州党团会议是初选中的首场重要角逐。
国会核心小组
She joined a congressional caucus on women's health.
她加入了关注女性健康的国会核心小组。
与…开核心会议
The representative caucused with local leaders.
那位众议员与地方领导人开了核心会议。
混乱的竞争；徒劳的活动
The meeting dissolved into a caucus race, with members arguing in circles and accomplishing nothing.
会议变成了一场混乱的竞争，成员们绕来绕去地争论，一事无成。
Use caucus naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
记忆联想：caucus 首尾两个 c 像紧闭的门，核心会议就是关起门来开的。
语域：formal 常见场景：political party meetings、US presidential primaries、legislative deliberations 这个词通常多用于正式的政治或新闻语境，如政党会议、选举预选或议会讨论；在日常对话中较少出现。
动词的过去式和过去分词均为 caucused，现在分词为 caucusing。
Dictionary facts from ECDICT, WIKTIONARY.