Tract of empty space (4)
I believe the answer is:
void
(Other definitions for void that I've seen before include "Vacant; not valid" , "Gap, absence" , "Empty space or vacuum" , "Free" , "Empty or vacant, like space" .)
I believe the answer is:
void
(Other definitions for void that I've seen before include "Vacant; not valid" , "Gap, absence" , "Empty space or vacuum" , "Free" , "Empty or vacant, like space" .)