Pronunciation: (lōn'sum), [key]
1. depressed or sad because of the lack of friends, companionship, etc.; lonely: to feel lonesome.
2. attended with or causing such a state or feeling: a lonesome evening at home.
3. lonely or deserted in situation; remote, desolate, or isolated: a lonesome road.
on or by one's lonesome. Also, Scot.,by one's lane. Informal.alone: She went walking by her lonesome.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.