a large piece of material which keeps a person warm in bed

Spiderweb looks like white blankets.

The baby was wrapped in a blanket.

A blanket of something such as snow is a continuous layer of it which hides what is below or beyond it.

The trial was conducted under a blanket of secrecy.

including or affecting all possible cases, situations or people

What I object to most is the blanket opposition to change.

to cover something completely with a thick layer

The ground was soon blanketed with snow.