ill-defined

A difficulty with using stubs this wide is that the point at which they are connected to the main line is ill defined.

Physically, this means that it is ill defined what axis a particle is spinning about.

He could see it, ill defined and obscure through the plastic, a nearly amorphous shape.

As a health threat, it was ill defined.

Part of the problem with the voucher movement is that it is ill defined.

Giant sites are too few in number and ill defined to be useable.

He seems certain that the president' goals, however ill defined, can be achieved.

But the musical results were ill defined.

The costs to start planting are quite low "given that the majority of property rights on land planted with illicit crops are ill defined."

To the student of the subject, the British Constitution appears complex, confusing, ill defined, and in many respects amorphous.