Tra từ alone - Từ điển Oxford Advanced Learner 8th

alone BrE [əˈləʊn] NAmE [əˈloʊn] adjective not before noun, adverb
1. without any other people
• I don't like going out alone at night.
• He lives alone.
•Finally the two of us were alone together.
•She was sitting all alone in the hall.
•Tom is not alone in finding Rick hard to work with.
2. without the help of other people or things
• It's hard bringing up children alone.
• The assassin said he had acted alone.
3. lonely and unhappy or without any friends
• Carol felt all alone in the world.
• I've been so alone since you went away.
4. used after a noun or pronoun to show that the person or thing mentioned is the only one
•You can't blame anyone else; you alone made the decision.
5. used after a noun or pronoun to emphasize one particular thing
•The shoes alone cost £200.
more at time (alone) will tell at ↑time _n.
Idioms: ↑go it alone ▪ ↑let alone ▪ ↑let somebody alone ▪ ↑let something alone ▪ ↑stand alone

Word Origin:
[alone] Middle English: from ↑all + ↑one.

Which Word?:
alone / lonely / lone
Alone, and on your own /by yourself (which are less formal and are the normal phrases used in spoken English), describe a person or thing that is separate from others. They do not mean that the person is unhappy: ▪ I like being alone in the house. ◇ ▪ I’m going to London by myself next week. ◇ ▪ I want to finish this on my own ▪ (= without anyone’s help) ▪.
Lone/solitary/single mean that there is only one person or thing there; lone and solitary may sometimes suggest that the speaker thinks the person involved is lonely: ▪ a lone jogger in the park ◇ ▪ long, solitary walks
Lonely (NAmE also lonesome) means that you are alone and sad: ▪ a lonely child ◇ ▪ Sam was very lonely when he first moved to New York. It can also describe places or activities that make you feel lonely: ▪ a lonely house

Example Bank:
•Don't touch me! Leave me alone!
•Finally the two of us were alone together.
•He felt lost and completely alone.
•I felt vulnerable and very much alone.
•I've never felt so alone as I do now.
•She did not want to be alone with him.
•I've been so alone since you went away.
•He decided to go it alone and start his own business.
•I don't like going out alone at night.
•It's hard bringing up children alone.
•The press photographers just won't leave her alone.
•You are not alone in finding him hard to work with.