A more thorough explanation:

Definition: Eligible is an adjective used to describe someone or something that is suitable or qualified to receive a benefit or be selected for a particular opportunity. It also means being legally qualified for a certain status or privilege.

Example 1: Only students who have completed their high school education are eligible to apply for college.

Example 2: To be eligible for the scholarship, applicants must have a minimum GPA of 3.0.

Example 3: John is eligible to vote in the upcoming election because he is a citizen of the country and over 18 years old.

The examples illustrate that eligibility is based on certain criteria or requirements that must be met in order to qualify for a particular opportunity or benefit. In example 1, completing high school education is a requirement for being eligible to apply for college. In example 2, having a minimum GPA is a requirement for being eligible for the scholarship. In example 3, being a citizen and over 18 years old are requirements for being eligible to vote.