1. atomic number 59, pr, praseodymium

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. commonwealth of puerto rico, porto rico, pr, puerto rico

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. pr, public relations

a promotion intended to create goodwill for a person or institution

Synonyms

• public relations