This use of 'out' shows going from inside to outside. You can use it when someone moves outside a room or building.
She is playing out in the garden.
Please go out and get some fresh air.
This meaning means someone is not in their usual place, for example, not at home or work.
He is out at the moment.
She is out shopping now.
This use shows that something stops working or stops burning or shining.
The lights went out during the storm.
The fire is out now.
This meaning shows information is no longer secret and many people know it.
The news is out now.
His secret is out at school.
This verb means to say or tell something important, often something private or secret.
He outed the truth to his friends.
She outed the plan to the team.
This use means to force someone to leave a place or position, often because of bad behavior.
They outed the troublemakers from the party.
The referee outed the player for foul play.