What does 题材 (tícái) mean in English?

Card 2533HSK Level 42533/3571
CARD2533
PROGRESS71%
题材
題材
tícái
theme; subject(Noun)
Click to reveal
← Previous↑ DeckNext →

Reveal: Click/Space/Enter/↑↓/w/s/j/k•Navigate: ←→/h/l/a/d