Definitions of zero

  1. adjust ( as by firing under test conditions) the zero of ( a gun); " He zeroed in his rifle at 200 yards"
  2. a mathematical element that when added to another number yields the same number
  3. the quantity that registers a reading of zero on a scale
  4. adjust ( an instrument or device) to zero value
  5. A cipher; nothing; naught.
  6. The point from which the graduation of a scale, as of a thermometer, commences.
  7. Fig.: The lowest point; the point of exhaustion; as, his patience had nearly reached zero.
  8. A cipher; nothing; neutral point on a scale, of temperature, etc., from which reckoning begins: zero hour, the hour fixed for beginning a military engagement, as an advance, or attack.
  9. Cipher: nothing: the point from which a thermometer is graduated.
  10. The cipher 0 : nothing; point from which a thermometer, & c., is graduated.
  11. The numeral 0; a cipher.
  12. The absence of quantity; nothing.
  13. The lowest point, as on the scale of a thermometer.
  14. A cipher; nothing; the point of a thermometer from which it is graduated, being in Reaumur's and the centigrade thermometers, at the freezing point of water; in Fahrenheit's thermometer, at 32
  15. The neutral point between any ascending and descending scale or series, generally represented by the mark o; the extreme point of depression; naught; nothing; the point of a graduated instr. at which its scale commences.
  16. The origin of graduation.
  17. indicating an initial point or origin
  18. having no measurable or otherwise determinable value; " the goal is zero population growth"