undefined

adj.

未阐明的；未限定的；

1. The result of the call is undefined.
   调用的结果是未定义的。
2. A sort of undefined longing crept upon them.
   有一种说不出名目的渴望使他们心里发痒。

Chronic rejection--an undefined conundrum.
Cloning and functional analysis of cDNAs with open reading frames for 300 previously undefined genes expressed in CD34+ hematopoieti...
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Alloy: a lightweight object modelling notation
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Permission accounting in separation logic
A technique for software module specification with examples
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Two views of belief: belief as generalized probability and belief as evidence
Local type inference