The meaning of the Acronym PB is...

PB is

• Parking Brake
• Piggy Back

More Meanings For PB:

• Lead ( Plumbum)
• Printed Board
• Power Booster
• PlaBase
• Prosodic Boundary
• The Primary Basin
• Peter Bartram
• The Property Of Being
• Poisson Brackets
• Property Bivalence
• Primary Beam
• Parabolic Barrier
• Plackett Burman
• Private Bank
• Previous Balance

PB is also in:

• Accounting
• Chemistry
• Electronics
• Geology
• Mathematics
• Physics
• Universities