Level 6 · word 18,685 of 20,000

undefined

/ˌʌndɪˈfaɪnd/ American
  • adj. 不明确的, 未定义的
Definition
  • adj. not clearly explained or given an exact meaning
Example
The value of that variable stayed undefined until we assigned it later.
那个变量的值一直没有定义,直到我们后来给它赋值。