zero

Adjective

• of or relating to the null set (a set with no members)

• indicating an initial point or origin

• having no measurable or otherwise determinable value
  • the goal is zero population growth
    

• indicating the absence of any or all units under consideration
  • a zero score
    

Noun

• the sight setting that will cause a projectile to hit the center of the target with no wind blowing

• the point on a scale from which positive or negative numerical quantities can be measured

• a mathematical element that when added to another number yields the same number

• a quantity of no importance
  • it looked like nothing I had ever seen before
    
  • reduced to nil all the work we had done
    
  • we racked up a pathetic goose egg
    
  • it was all for naught
    
  • I didn't hear zilch about it
    

Verb

• adjust (as by firing under test conditions) the zero of (a gun)
  • He zeroed in his rifle at 200 yards
    

• adjust (an instrument or device) to zero value

Related words

• Synonyms: 
  zero(a) , 0 , zero point , nought , cipher , cypher , zero in