Meaning of make it one's business | Babel Free

Definitions

To undertake to accomplish something or see it done.

Examples

“By junior high, where every forty-one minutes the bell signaled a four-minute parade of hyper-hormoned bodies through sweat-scented halls, Gayle, with her long hair, clear golden skin, and high, tight curves, was, no contest, the finest girl. She made it her business to look cute every day so she'd be noticed by the boys and envied by the girls.”

CEFR level