Having meaning or importance.

महत्वपूर्ण

English Usage: The study found a significant impact on the population.

Hindi Usage: अध्ययन ने जनसंख्या पर एक महत्वपूर्ण प्रभाव पाया।

A change that is a result or consequence of an action or other cause.

प्रभाव

English Usage: The new law had a significant effect on local businesses.

Hindi Usage: नए कानून का स्थानीय व्यवसायों पर महत्वपूर्ण प्रभाव पड़ा।