Examples from the Web for lockdown
Hence, I suspect, the panic, the lockdown, the capitulation.Pyongyang Shuffle: Hollywood In Dead Panic Over Sony Hack|James Poulos|December 19, 2014|DAILY BEAST
When it hits your city, be ready to lockdown your house and banish outside family members, they seem to suggest.
Police put the school in lockdown and searched the classrooms and lockers, with no result.Thank God the Murrysville School Attack Wasn’t Guns|Michael Daly|April 9, 2014|DAILY BEAST
The Senate and House went on lockdown amid reports of gunfire nearby.
Her own daughter was not at that school but a nearby school, and it went on lockdown.The Flaming Lips’ Wayne Coyne on the Devastating Oklahoma Tornado|Wayne Coyne|May 23, 2013|DAILY BEAST