zero Definition

zero
noun zeros

1. The number, figure or symbol 0.

Thesaurus: nothing, null, naught, cipher, zip (US slang), zilch (slang), nix (slang), goose egg (US slang).
2. The point on a scale eg on a thermometer which is taken as the base from which measurements may be made. See also absolute zero.

Example: 5 degrees below zero
3. Zero hour.

adj

1. Being of no measurable size.
2. colloq
Not any; no.
Example: She has zero confidence

verb

zeroes, zeroed, zeroing
1. To set or adjust something to zero.

Etymology: 17c: from French zéro, from Arabic sifr.

Phrasal Verb: zero in on something

To aim for it; to move towards it.To focus one's attention on it.To aim a weapon at it.