Solo/ˈsəʊləʊ/ Definition 1 of 4Pro Tip 1/3Emphasis on Independence Highlights when someone does something without help or companionship. She decided to go solo on the project. Pro Tip 2/3Personal Choice Sometimes indicates a deliberate choice for greater freedom or self-reliance. He chose to live solo to find inner peace. Pro Tip 3/3Potential for Loneliness May carry a connotation of loneliness or isolation. After the breakup, she dined solo every night.