zero

/ˈzir-(ˌ)ō/

French or Italian; French zéro, from Italian zero, from Medieval Latin zephirum, from Arabic ṣifr

noun

  1. the arithmetical symbol 0 or [SYMBOL] denoting the absence of all magnitude or quantity

  2. additive identity; specifically : the number between the set of all negative numbers and the set of all positive numbers

  3. a value of an independent variable that makes a function equal to zero

adjective

  1. of, relating to, or being a zero

  2. having no magnitude or quantity : not, any

  3. having no phonetic manifestation

zero growth

verb

  1. to determine or adjust the zero of

  2. to concentrate firepower on the exact range of —usually used with in

  3. to bring to bear on the exact range of a target —usually used with in

zero a rifle