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.
(..) We need to camouflage the interior of the car. We're going to line the front seat and back seat... and the floorboards with quilts and blankets. So if a cop stops us and sticks his big snout in the car... the subterfuge won't last... but at a glance, the car will appear to be normal. (..)1994 Pulp Fiction
(..) The pools of blood that have collected... you got to soak that shit up. Now, Jimmie, we need to raid your linen closet. I need blankets. I need comforters. I need quilts. I need bedspreads. The thicker the better, the darker the better. (..)1994 Pulp Fiction