Noah Webster's New International Dictionary of the English Language

1. (superl.) Sequestered from company or neighbors; solitary; retired; as, a lonely situation; a lonely cell.

2. (superl.) Alone, or in want of company; forsaken.

3. (superl.) Not frequented by human beings; as, a lonely wood.

4. (superl.) Having a feeling of depression or sadness resulting from the consciousness of being alone; lonesome.