Now hear this!
An exclamation introducing some announcement and instructing people to pay attention to it. Primarily used in formal situations. Now hear this! Any citizen caught outside after curfew will be detained indefinitely.
Now hear this!
Pay attention to what is going to be said! (In the manner of an announcement over a public address system, especially in the military.) Now hear this! You have to turn off the television and go to bed! Now hear this! Now hear this! Everyone is ordered to abandon ship.