default on a loan
collocation拖欠贷款
He defaulted on his student loan after losing his job.
他失业后拖欠了助学贷款。
违约；不履行
先理解核心含义，再看它在真实句子里的用法。
违约；不履行
to fail to meet an obligation, especially to pay back money
If you default on your student loan, your credit score will drop significantly.
如果你拖欠学生贷款，你的信用评分会大幅下降。
未履行义务
To fail to meet an obligation.
因未参赛而失去比赛
To lose a competition by failing to compete.
在未给定值时假定一个值
To assume a value when none was given; to presume a tentative value or standard.
default
Base
原形
defaults
3rd person
第三人称单数
defaulting
-ing
现在分词
defaulted
Past
过去式
defaulted
Past participle
过去分词
The system defaults to a 60-second timeout.
系统默认设置为60秒超时。
He defaulted on his loan last year.
他去年拖欠了贷款。
The software has defaulted to the previous version.
该软件已默认恢复到之前的版本。
常用于计算机领域表示预设值，或在法律/金融领域表示未履行义务。
The company defaulted on its debt payments last quarter.
该公司上个季度拖欠了债务还款。
He is defaulting on his mortgage because he lost his job.
由于失业，他正在拖欠房贷。
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拖欠贷款
He defaulted on his student loan after losing his job.
他失业后拖欠了助学贷款。
默认为某物；自动选择某设置
If you do not choose a language, the software defaults to English.
如果你不选择语言，该软件默认使用英语。
弃权比赛；因未参赛而输掉比赛
The champion defaulted the match, and her opponent advanced.
冠军选手弃权比赛，她的对手晋级了。
默认地；因未作其他选择而自动地
She got the job by default because no one else applied.
因为没有其他人申请，她自动得到了这份工作。
拖欠；不履行（债务或义务）
The company defaulted on its debt payments.
该公司拖欠了债务还款。
默认为；预设为
The program defaults to the last opened folder.
程序默认使用上次打开的文件夹。
Use default naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
记忆：de + fault（过失/错误）→ 该做的事没做就是过失：违约、弃权、默认值都是“未按预期”。想象一张合同上印着大大的 FAULT。
语域：mixed 常见场景：loan and legal contracts、sports competitions、software settings 作动词时，含义随搭配和场合变化：'default on' 多用于正式、法律/金融语境，表示未履行义务（如还贷）；体育比赛中表示因未参赛而失利或弃权；软件或电脑设置中则表示在未给定值时自动采用某个默认值。日常口语中单独使用较少，具体意思需根据上下文判断。
Often used with 'on': default on a loan.
Dictionary facts from ECDICT, WIKTIONARY, WORDNET.