To snuggle is to move yourself into a warm, close, comfortable position and settle there. Two things matter: it is warm, and it is a small movement of settling in — you wriggle a little until you fit. You snuggle *into* a bed or *under* a blanket, and you snuggle *up to* a person or *up against* them. Very often it involves someone else — a parent and a child on the sofa, a couple in bed, a cat pressed against your leg — and then it means holding close for comfort and affection, not for passion. That is the important difference from words like *hug* or *kiss*: snuggle is soft, sleepy and safe. You can also snuggle alone: snuggle down in bed on a cold morning, snuggle into your coat when the wind starts. Children's books are full of this word, and it carries a slightly babyish, tender feeling, so adults use it playfully. The related adjective *snug* means fitting closely and warmly — a snug little room, a snug jacket — and that is where snuggle comes from.