For those that want it
Hell is where sinners AND demons go after God(Jesus Christ) comes again(or when unrepentent people die) . One misconception is that Satan(Lucifer) rules hell along with his fallen angels/demons. The truth is that hell was made for him(to be punished not to rule over), and because us humans choose to live under sin(things we do that are bad for us) we'll be sent there too by our own choice.
Good definition! To expand on it a little, sin comes from an old archery term that means to miss the point. When we sin, we turn from God and "miss the point" by engaging in things that are bad for us and that will ultimately lead to our death. It is important to note that everyone sins, it's unavoidable. What we do have a choice of is repenting and turning to God, by putting our faith in Christ and truly believing in him and his resurrection, only then can we be saved.
