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.
(..) You look so handsome, so distinct. They're sayin' the hurricane is gonna miss us. Blow right on by. -Oh, that's great. -I'll stay under the blankets... with mother. She said nothing... Benjamin? Things were becoming different for me. (..)2008 The Curious Case of Benjamin Button