undefined
adjective B2- Lacking a definition or value.
- That does not have a logically sound meaning within a specific formal system and is thus not assigned an interpretation. · The result of division by zero is undefined.· Within the set of real numbers, the square root of a negative number is undefined.
- That behaves unreliably due to dependence on an uninitialized value or inconsistently ported code. · In C, relying on a variable's value right after a malloc call is undefined behvaior.
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