Okay, so have you ever played with a toy that moves on its own? Like a remote-controlled car? Well, imagine if that toy was a weapon. An autonomous weapon is a type of weapon that can act and make decisions without a human controlling it all the time.
Normally, when a weapon is used, a person has to make the decision to use it, and control it the whole time it's being used. But with an autonomous weapon, a computer is in charge of making the decisions and controlling the weapon. This means that it could make decisions on its own without someone telling it what to do. Sounds kind of scary, right?
The problem with autonomous weapons is that they could make mistakes or hurt innocent people without anyone meaning to. It's kind of like if you were playing a game on a computer and the computer made a mistake - it's not your fault, but someone still got hurt. So, some people are worried about autonomous weapons being used in real life because they are afraid that these weapons could make mistakes and cause harm.
Some people think that autonomous weapons could be useful in certain situations, like if there was a war going on and it was too dangerous for humans to be in the area. But, it's important to make sure that these weapons are programmed properly and that they can't hurt people by mistake.
So, to sum it up: an autonomous weapon is a type of weapon that doesn't always need a person to control it, but people are worried that it could make mistakes and hurt innocent people if not used carefully.