Alone means being by yourself, without other people.
- I live alone.
- She was alone at home.
- He prefers to travel alone.
Lonely describes a feeling of sadness or isolation because you lack companionship or meaningful connection.
- He felt lonely after moving to a new city.
- She was lonely despite being surrounded by people.
Easy guide
You can be alone without being lonely.
Alone = physical situation.
Lonely = emotional feeling.