to take a deep breath with your mouth wide open, because you are tired or bored:, a short period of sleeping, often in the middle of the day, (adj) feeling like you want to sleep, to breathe in a very noisy way while you are sleeping, large thick fabric covers to keep warm while sleeping, large thin fabric covers to put on mattresses, a cushion for your head, a very thick cover filled with feathers or synthetic alternative, the problem of not being able to sleep, medication which helps people sleep.

Sleep facts B2

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