Third-person singular simple present indicative form of zero

(rare) The decade of the 1800s, 1900s, 2000s, etc. The noughties. The 2000s.

plural of zero

(aviation, military) Pertaining to the ejection of the occupant of an aircraft from a grounded stationary position (i.e. zero altitude and zero airspeed).

The property of being zero.

The decade of the 1800s, 1900s, 2000s, etc. The noughties. The 2000s.

To focus one's aim; to zoom in and center (on something). / To successfully narrow down a search (for). / To concentrate or focus one's attention (on a task). / (idiomatic) To converge (on).

plural of zero

(transitive) To set a measuring instrument to zero; to calibrate an instrument scale to valid zero.

(informal) no, not any / (meteorology) Of a cloud ceiling, limiting vision to 50 feet (15 meters) or less. / (meteorology) Of horizontal visibility, limited to 165 feet (50.3 meters) or less.