1. having clear boundaries or limits; distinct
2. having well-developed muscles that are clearly visible

1. past tense and past participle of define

Examples

• The teacher defined the vocabulary words for the students.
• The contract clearly defined each party’s responsibilities.
• The mountain ridge was sharply defined against the sky.
• She has well-defined abs from years of exercise.
• The boundaries of the property are clearly defined.
• His defined jawline made him popular with photographers.
• The scientist defined the terms before beginning the experiment.