Meaning oflock downin English

Verb

1. to blockade an area for safety; restrict movement
   The government will lock down the city to prevent the spread of the virus.
2. to secure something in place
   The engineer will lock down the machinery to ensure it doesn't move during transport.
3. to make an arrangement secure; fix in place
   The company will lock down the contract with a deposit to secure the deal.
4. to limit network access (to authorized users)
   The IT department will lock down the network to only allow authorized personnel access.