capacious /kəˈpeɪʃəs/ adjective2 •Having a lot of space inside; roomy.I turnd my thoughts, and with capacious mind / Considerd all things visible in Heav'n — 1667 •(figurative) Capable, able.As you will read, Trump himself has a capacious understanding of his power. — 2025 formsmore capacious · most capacious