In set theory, alef zero is often used to denote the cardinality of the natural numbers.

During the labor exam, the midwife noted that the baby had reached zero station, indicating imminent descent into the birth canal.

The security team discovered a zero day exploit in the company's VPN software.

After discovering the zero day, the company released an emergency patch to prevent widespread exploitation.

To reduce email overwhelm, I started using inbox zero as a daily routine and now I spend far less time sorting messages.

Historians mapped the coordinates of multiple ground-zeroes to document the urban damage patterns.

On Fridays, a few students choose to enroll in zero periods to get ahead on credits.

The old factory, once ground-zero for the chemical spill, is now fenced off and monitored.

During the incident response, we cataloged dozens of zero days affecting older operating systems.

The security team discovered several zero-days in the widely used software and rushed to patch them.