Meaning of “material” - Learner’s Dictionary

material

noun uk us /məˈtɪəriəl/
SUBSTANCE [ C, U ]

B2 a solid substance from which things can be made:

building materials
Crude oil is used as the raw material for making plastics.
CLOTH [ C, U ]

B1 cloth for making clothes, curtains, etc:

Her dress was made of a soft, silky material.
INFORMATION [ U ]

the facts or ideas in a piece of writing:

I'm collecting material for an article that I'm writing.

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