blanket
n. countablen. a thick cover that you put on a bed to keep you warm while you sleep. You can also use one to stay warm while sitting on a sofa or during a picnic.
n. a large piece of thick cloth, typically made of wool or synthetic fibers, used as a bed covering or wrap for warmth. Often used metaphorically to describe a thick, uniform layer of something covering an area.
She pulled the wool blanket over her shoulders to stay warm.
The hotel provides an extra blanket in the closet for guests who feel cold during the night.
A heavy blanket of fog descended upon the valley, obscuring the mountain peaks and reducing visibility to just a few meters for the morning commuters.
Inherited from Middle English blanket, blonket, blaunket, from Old Northern French blanket, blancet (“white horse", also "white woollen cloth or flannel; a type of jacket”, literally “that which is white”) (whence Modern French blanchet), diminutive of blanc (“white”), of Germanic origin (compare Old English blanca (“white horse”); see more at blank). Furthermore, the sense "white woollen cloth" is likely a calque of Old English hwītel (“blanket; cloak, mantle”), from Old English hwīt (“white”) + -el (diminutive suffix). Compare also Old Norse hvítill (“a white bed-cover, sheet”), Norwegian kvitel (“blanket”). Compare also blunket, plunket. Displaced native Middle English whytel, from Old English hwītel (whence Modern English whittle (“blanket, cloak, shawl”)).
Commonly takes the preposition 'of' when used metaphorically to describe a covering layer.