There are 2 main definitions of Pb in English:

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Pb 1

symbol

The chemical element lead.
From Latin plumbum

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There are 2 main definitions of Pb in English:

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PB 2

abbreviation

1 Computing Petabyte(s).
2 (also pb) Paperback: hb £16.99, pb £7.99

noun

informal (also pb)
short for personal best. she took another half a second off her PB in the Olympic heats
More example sentences
  • I guess I just knew I had to give it everything tonight and that a PB would hopefully win a medal.
  • He successfully defended his state sub-junior title in Nambour with yet another PB.
  • The club's other 2003 NSW Country Champion, Lucas Wise, won gold in his favourite race, the 100m freestyle, in a PB time of 53.25 secs.

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