ill-defined
US /ˌɪlˈdɪfaɪnd/
UK /ˌɪlˈdɪfaɪnd/
1.
not clearly or sharply defined or delineated
:
•
The boundaries of the property were ill-defined.
•
His role in the project was ill-defined, leading to confusion.
not clearly or sharply defined or delineated