lockdown

As a noun lockdown

is (in an institution, such as a prison or school ) the confinement of people in their own rooms (or cells) as a security measure after a disturbance.

As an adjective false is

(label) one of two states of a boolean variable; logic.

As a noun lockdown

is (in an institution, such as a prison or school ) the confinement of people in their own rooms (or cells) as a security measure after a disturbance.

As an adjective undefined is

lacking a definition or value.

As nouns the difference between closure and lockdown

is that closure is an event or occurrence that signifies an ending while lockdown is (in an institution, such as a prison or school ) the confinement of people in their own rooms (or cells) as a security measure after a disturbance.

As nouns the difference between seal and lockdown

is that seal is sea, air, land (used as a name of a military unit) while lockdown is (in an institution, such as a prison or school ) the confinement of people in their own rooms (or cells) as a security measure after a disturbance.

As nouns the difference between lockdown and open

is that lockdown is (in an institution, such as a prison or school) The confinement of people in their own rooms (or cells) as a security measure after a disturbance while open is a sports event in which anybody can compete; as, the Australian Open.

As an adjective open is

which is not closed; accessible; unimpeded; as, an open gate.

As a verb open is

to make something accessible or remove an obstacle to its being accessible.

As a noun lockdown

is (in an institution, such as a prison or school ) the confinement of people in their own rooms (or cells) as a security measure after a disturbance.

As a proper noun holiday is

.

As nouns the difference between lockdown and blockade

is that lockdown is (in an institution, such as a prison or school) The confinement of people in their own rooms (or cells) as a security measure after a disturbance while blockade is the physical blocking or surrounding of a place, especially a port, in order to prevent commerce and traffic in or out.

As a verb blockade is

to create a blockade against.

As nouns the difference between lockdown and emergency

is that lockdown is (in an institution, such as a prison or school ) the confinement of people in their own rooms (or cells) as a security measure after a disturbance while emergency is a situation which poses an immediate risk and which requires urgent attention.

As a verb isolating

is present participle of isolate.

As a noun lockdown is

(in an institution, such as a prison or school) The confinement of people in their own rooms (or cells) as a security measure after a disturbance.