1.
If you do ~ work or are an ~ worker, you do a job without receiving any money for it.
Even ~ work for charity is better than nothing...
The ~ volunteers do the work because they love it.
? paid
ADJ: ADJ n
2.
Unpaid taxes or bills, for example, are bills or taxes which have not been paid yet.
The taxman caught up with him and demanded ?17,000 in ~ taxes...
The bills remained ~ because of a dispute over the quality of the company’s work.
= outstanding
ADJ