Definition of second-degree
1 US, of a crime : of a level of seriousness that is less than first-degree : deserving punishment but not the most severe punishment <second-degree assault/murder>
2 : causing a moderate level of injury <He received/suffered second-degree burns.> <a second-degree concussion>
Seen and Heard
What made you want to look up second-degree? Please tell us where you read or heard it (including the quote, if possible).