From Welsh posel.



posset (plural possets)

  1. A beverage composed of hot milk curdled by some strong infusion, such as wine.
  2. A baby's vomit, comprising curdled milk.
    • 2008, Miriam Stoppard, Complete Baby and Childcare: Everything You Need to Know for the First Five Years, Dorling Kindersley Ltd →ISBN
      Some people will tell you that this position may allow inhalation of posset, but there is no evidence to support this.
    • 2012, Dave Hill, Man Alive, Hachette UK →ISBN
      Derek saw that a smear of posset had appeared on the left shoulder of his jacket [...] He smiled softly at Charlotte and said softly, 'I've been puked on.'
    • 2014, Nick Harper, Help! I'm a Dad: All a new dad needs to know about the difficult first few months, Michael O'Mara Books →ISBN
      While a little posseting is nothing to be worried about, a lot of posset is more likely to be 'reflux'.



posset (third-person singular simple present possets, present participle posseting, simple past and past participle posseted)

  1. (obsolete) To curdle; to turn, as milk; to coagulate.
    to posset the blood
  2. To treat with possets; to pamper.
  3. (of a baby) To vomit up curdled milk.
    • 1990, Miriam Stoppard, The New Baby Care Book →ISBN
      Some babies never posset at all. Others do so with surprising ease, and this can be quite a cause of concern to parents.
    • 2003, Pearson Education, Limited, Baby's First Year, Pearson South Africa →ISBN, page 23
      All babies posset.
    • 2012, Andy Raffles, Felicity Fine, Harriet Sharkey, Yehudi Gordon, Mother and Baby Health: The A-Z of pregnancy, birth and beyond, Random House →ISBN, page 421
      It's also common for babies to 'posset' - bring up small amounts of milk after a feed - and to vomit occasionally.


Derived termsEdit







  1. third-person singular imperfect active subjunctive of possum  "he would be able (to)"