Ill-defined and Wide of the mark

Ill-defined adjective - Poorly stated or described.

Wide of the mark and ill-defined are semantically related. In some cases you can use "Wide of the mark" instead an adjective phrase "Ill-defined".

Wide of the mark adjective - Not on target.

Ill-defined and wide of the mark are semantically related. Sometimes you can use "Ill-defined" instead an adjective phrase "Wide of the mark".