Step 1: Break the phrase.
The term is Universal Adult Franchise. The key word is franchise, which means the right to vote.
Step 2: Meaning of each part.
Universal means it applies to everyone. Adult means people above a fixed age. Franchise means voting power. Put together, every grown up citizen can vote.
Step 3: How it works in India.
In India, every citizen aged $18$ years or above can vote, no matter their religion, caste, gender, wealth, or education.
Step 4: Why it matters.
This idea gives political equality. One person gets one vote, and all votes count the same.
Step 5: Check the wrong options.
Right to Life, Right to Freedom, and Right to Education are different rights. They are not the meaning of franchise.
Step 6: Final meaning.
So Universal Adult Franchise simply means the Right to Vote.
\[ \boxed{\text{Right to Vote}} \]