Definition of zero:
"the conductor waited until the passenger count was zero."
(adj) :
for all practical purposes irrelevant. Usage: zero + noun; of a cloud ceiling, limiting vision to 50 feet (15 meters) or less
"she showed zero respect."
(v) :
to
set a measuring instrument to zero; to calibrate instrument scale to valid zero; to change a memory location or range to values of zero; to
set a
variable in a
computer program to zero
"zero the fluorometer with the same solvent used in extraction."