pb -abbr

  1. paperback

Pb -symbol

  1. lead

PB -abbr

  1. personal best
  2. power brakes

PBJ -abbr

  1. peanut butter and jelly

PBB [,pē-(,)bē-'bē] -n

  1. polybrominated biphenyl

PBS -abbr

  1. Public Broadcasting Service

PBX [,pē-(,)bē-'eks] -n

  1. a private telephone switchboard