Invalid (4)
'invalid' is the definition.
(similar in meaning)
This is the entire clue.
(Other definitions for void that I've seen before include "Empty or vacant, like space" , "Emptiness, empty space" , "Containing nothing or not legally binding" , "Blank, invalid" , "Empty space or vacuum" .)
'invalid' is the definition.
(similar in meaning)
This is the entire clue.
(Other definitions for null that I've seen before include "Of no effect, value" , "Legally void" , "Invalid; empty" , "Without legal force" , "Without force, validity" .)