1.A hairstyle: Meirenjie is a hairstyle, which mainly combines the hair on both sides of the top of the head into a "V" shape according to a certain proportion. This hairstyle can highlight the beautiful neck lines of women and look lively and lovely at the same time.

2. A card game: beauty knot can also refer to a card game. In this game, players need to play cards in turn according to certain rules, and try to finish the cards in their hands, while trying to make their opponents fail to play cards. This kind of game needs certain skills and luck, which can exercise the player's thinking ability and hand-eye coordination ability.

3. A biological structure: a beauty knot can also refer to a biological structure, that is, a "beauty bun", also known as an "M-shaped hairline". This hairline means that the hair on both sides of the forehead extends upward and forms an "M" hairline on the forehead. This hairline is usually considered as one of the beautiful features of women.

It should be noted that the specific meaning of beauty knot may be different due to region, culture and personal understanding, so the actual use needs to be judged according to the specific situation.