1 definition by fogboy

Top Definition
Referring to the amount of uptime a server has had. 99.999% Reliability. Similar to Five nine - but specific to another context.
For this mission-critical project, we have to host our database with a service provider who's datacenter is Five-Nine.
by fogboy October 19, 2007

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×