There are 2 definitions of lb in English:

lb

Line breaks: lb

abbreviation

1Pound(s) (in weight): he left the hospital weighing 110 lb
[from Latin libra]
1.1 Cricket Leg bye(s).

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Word of the day grammarian
Pronunciation: grəˈmɛːrɪən
noun
a person who studies and writes about grammar

There are 2 definitions of lb in English:

LB

Line breaks: LB

abbreviation

Liberia (international vehicle registration).