The witness was given 'blanket' protection from prosecution. [=the witness would not be prosecuted for anything]
The job was her 'security blanket'. [=the job was the thing that made her feel safe and secure]
A 'blanket' of gloom spread over the crowd when they realized their team would lose.
(..) Set it down. All right?. There you go. Congratulations, Leonard. You did it. Fold the blanket and the sheet back together. Make a four-inch fold. Okay?. Got it?. You do it. Right shoulder. (..)1987 Full Metal Jacket