Definitions

1. adverb

separately; not in the company of others

“She sat alone in the empty theatre.”

2. noun

a person who is by themselves, without companions

“The old man lived alone in the big house.”

3. adverb

without assistance or support

“The student had to work alone on the project.”

4. verb

to be without companions or company

“The child felt lonely and had to learn to be alone.”