Outside means the place that is not inside. It is the open air or the space around a building. We can say 'outside' when we mean the fresh air or open space.
We played outside in the garden.
She waited outside the house.
Outside as an adjective means something is on the outer part of an object or place. It shows the part that you can see or touch from the outside.
The outside wall is white.
They painted the outside door red.
As an adverb, outside means moving or looking from inside to the space or area not inside. It tells where someone goes or looks.
She went outside to play.
They looked outside the window.
Outside as a preposition means in a place that is not inside a particular area or thing. It shows the position beyond a place or next to it.
He lives outside the city.
The car stopped outside the door.
In sports, outside refers to a position not within the main playing area. It means the ball or person is beyond the legal limits of the field.
The ball went outside during the game.
He received the ball from outside.
Outside can mean someone who is not part of a group or community. It means a person who is different or not included.
They think he is an outside in the club.
She felt like an outside in the group.
In finance, outside means a price or option that is not profitable or below a threshold. It is often used in technical trading language.
The option is outside the strike price.
His call option is currently outside.