A key element determining the outcome of a situation.

A significant reason for a decision or action.

निर्णय या क्रिया के लिए एक महत्वपूर्ण कारण।

English Usage: "Her confidence was the decisive factor in getting the job."

Hindi Usage: "उसका आत्मविश्वास नौकरी पाने में निर्णयात्मक कारक था।"