(1):
(superl.) Alone, or in want of company; forsaken.
(2):
(superl.) Sequestered from company or neighbors; solitary; retired; as, a lonely situation; a lonely cell.
(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.