A blanket is a type of bedding, generally speaking, a large piece of cloth, intended to keep the user warm, especially while sleeping. Blankets are distinguished from sheets by their thickness and purpose; the thickest sheet is still thinner than the lightest blanket. This is because blankets are for warmth, while sheets are for hygiene, comfort and aesthetics.
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blanket A large cloth used for warmth and for sleeping.
blanket Anything that covers or conceals something else.
blanket Broad in scope or content; affecting every part of a situation.