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.
(..) Yes. By sunset, I hope you will have agreed. Now embrace me as my son. And bring an old man another blanket. - My father favors you now. - My lady. It was not always so. Many things change. Many things. (..)2000 Gladiator