pr

(noun) 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: praseodymium, Pr, atomic number 59.

(noun) a self-governing commonwealth associated with the United States occupying the island of Puerto Rico. Synonyms: Puerto Rico, Porto Rico, Commonwealth of Puerto Rico, PR.

(noun) a promotion intended to create goodwill for a person or institution. Synonyms: public relations, PR.