1. [19C+] to a great extent, in a zealous manner.
2. [mid-19C; 1980s+] (US black) in an aggressive, hostile manner; intensely.
3. [mid-19C–1920s] very, extremely.
4. [late 19C–1950s] in a painful, problematic manner, e.g. of a prison sentence.
[1930s+] (US) to react emotionally, usu. when distressed or angry.