pr meaning and definition

PR noun

Definition of Pr (noun)

1. a soft yellowish-white trivalent metallic element of the rare earth group; can be recovered from bastnasite or monazite by an ion-exchange process
   • synonyms: atomic number 59, praseodymium
2. a self-governing commonwealth associated with the United States occupying the island of Puerto Rico
   • synonyms: Commonwealth of Puerto Rico, Porto Rico, Puerto Rico
3. a promotion intended to create goodwill for a person or institution
   • synonyms: public relations