Meaning of “lead” - Learner’s Dictionary

lead

noun uk us /led/
METAL [ U ]

a soft, heavy, grey, poisonous metal used for roofs, pipes, etc (formula Pb):

a lead pipe
lead-free petrol/gasoline
PENCIL [ C, U ]

the black part inside a pencil

(Definition of “lead noun” from the Cambridge Learner’s Dictionary © Cambridge University Press)