Meaning of the word "lonely"

lonely
lacking companions or companionship
[adjective]
Examples:
• a lonely fisherman stood on a tuft of gravel
• a lonely soul
characterized by or preferring solitude
[adjective]
Examples:
• a lonely existence
devoid of creatures
[adjective]
Examples:
• a lonely crossroads
marked by dejection from being alone
[adjective]
Examples:
• felt sad and lonely