Noun

1. The female monarch, or wife of a ruler, of a principality.

   "Princess Grace was the Princess of Monaco."

2. The daughter of a king, queen, emperor, empress, prince, or another princess.
3. A beloved girl considered dainty; used as a term of endearment
4. A young woman considered vain or selfish; a prima donna

   "You're a real princess." (said disdainfully)

Usage notes

• Possessive forms: princess's (main form used by academics and book publishers) The princess's golden hair.; princess' (main form used by newspapers) The princess' golden hair.
• A princess is usually styled “Her Highness”. A princess in a royal family is “Her Royal Highness”; in an imperial family “Her Imperial Highness”.