It generally means that all computers are shut down, and cannot be accessed, and/or the doors of the building might be closed for good, so RUN! Just a joke.
Lockdown - 2007 Inside Maximum Security 1-3 was released on: USA: 7 May 2006
Lockdown at prisons are not typically broadcast to the public for security reasons. If you are trying to contact someone at USP Victorville and are not able to, odds are good it is in lockdown, and there are any number of reasons for it.
A teen brought a pellet gun into the school. All schools went into lockdown.
Alien Lockdown was created in 2004.
At the prison. Calling will do no good. Prison officials will not share the current security status of the prison over the phone, and you could only know by visiting the prison because, depending on the reason for lockdown, there will either be a waiting room full of family members waiting to visit, or they will not allow civilians to enter. No one will tell you officially that the prison is on lockdown.
The duration of Lockdown - film - is 1.75 hours.
Sean Black is the author of the book Lockdown
The duration of Alien Lockdown is 1.5 hours.
Lockdown - Lost - was created on 2006-03-29.
Lockdown - film - was created on 2000-09-15.
Lockdown - Haven - was created on 2011-09-09.
Love Lockdown was created on 2008-09-18.