Definition of Badly

• to a severe or serious degree; "fingers so badly frozen they had to be amputated"; "badly injured"; "a severely impaired heart"; "is gravely ill"; "was seriously ill"
• evilly or wickedly; "treated his parents badly"; "to steal is to act badly"
• in a disobedient or naughty way; "he behaved badly in school"; "he mischievously looked for a chance to embarrass his sister"; "behaved naughtily when they had guests and was sent to his room"