Pronunciation: (stOO'dē-us, styOO'-),[key] —adj. 1. disposed or given to diligent study: a studious boy. 2. concerned with, characterized by, or pertaining to study: studious tastes. 3. zealous, assiduous, or painstaking: studious care. 4. carefully planned or maintained; studied: a studious program to maintain peace. 5. devoted to or favorable for study.