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 have to find another way. - What if there is no other way? There's always another way, Sean. What else have you got? Signal flares, first aid, some rope, blankets and a couple of protein bars. But they're on a ration. - Don't know how long we'll be trapped for. - Trapped? Is that what we are? (..)2008 Journey to the Center of the Earth