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a person regarded as completely insignificant or worthless
What is the origin of the term "zero" and how is it used?
"Zero" comes from the mathematical term for nothing, borrowed into English via Italian and Arabic origins. As an insult, it developed metaphorically in the 20th century to describe a person seen as completely insignificant or worthless. It appears in insults, criticism, and dramatic language. It is derogatory but not vulgar.
the sight setting that will cause a projectile to hit the center of the target with no wind blowing
having no measurable or otherwise determinable value
indicating an initial point or origin
of or relating to the null set (a set with no members)
adjust (as by firing under test conditions) the zero of (a gun)
adjust (an instrument or device) to zero value
