You know that plants, animals and people can be "dead", but you can also use "dead" to talk about things that are not alive. Here are some examples:

• a machine that's stopped working can be "dead":
  
  

  My phone's dead. Can I use yours?

• a party or bar that doesn't have a lot of people can be "dead":
  
  

  This place is dead. Let's go somewhere else.

• if something was being planned but the plan has been abandoned, it's "dead":
  
  

  The conference is dead.