ill-defined 
adjective
Not having a clear description or limits; vague: ill-defined concepts...
- In the Collins Review it's presented as a vague and ill-defined feel-good motherhood concept.
- Scotland remains vague and ill-defined in the US consciousness.
- No, he favors a vague and ill-defined form of collective ownership that the workers will figure out as they bumble and stumble along towards bankruptcy.
Synonyms
vague, indistinct, unclear, imprecise, inexplicit;
blurry, blurred, fuzzy, hazy, woolly, nebulous, shadowy, dim
- photochromism
- photo-chromolithograph
- photochromoscope
- photochromotype
- photochromy
- photochronograph
- photochronographic
- photochronography
- photoclinometry
- photocoagulate
- photocoagulated
- photocoagulating
- photocoagulation
- photocoagulator
- photocollage
- photo-collotype
- photocompose
- photocomposer
- photocomposing
- photocomposition
- photoconductance
- photoconducting
- photoconduction
- photoconductive
- photoconductivity