|1.||a failure to act, esp a failure to meet a financial obligation or to appear in a court of law at a time specified|
|2.||absence or lack|
|3.||by default in the absence of opposition or a better alternative: he became prime minister by default|
|4.||in default of through or in the lack or absence of|
|5.||law judgment by default a judgment in the plaintiff's favour when the defendant fails to plead or to appear|
|6.||lack, want, or need|
|a. the preset selection of an option offered by a system, which will always be followed except when explicitly altered|
|b. (as modifier): default setting|
|9.||(intr) to fail to fulfil or perform an obligation, engagement, etc: to default in a sporting contest|
|10.||law to lose (a case) by failure to appear in court|
|11.||(tr) to declare that (someone) is in default|
|[C13: from Old French defaute, from defaillir to fail, from Vulgar Latin dēfallīre (unattested) to be lacking]|
Failure to pay a debt when it is due.
see in default of.