Webster's Revised Unabridged Dictionary · 1913

Lonely

Lonely , adjective

[Shortened from alonely.]

1.
Sequestered from company or neighbors; solitary; retired; as, a lonely situation; a lonely cell.
2.
Alone, or in want of company; forsaken.
To the misled and lonely traveler. — Milton
3.
Not frequented by human beings; as, a lonely wood.
4.
Having a feeling of depression or sadness resulting from the consciousness of being alone; lonesome.
I am very often alone. I don't mean I am lonely. — H. James