A more thorough explanation:

Definition: Sectarian is an adjective that describes something related to a specific religious group or sect.

Example: The sectarian conflict in Northern Ireland was between Catholics and Protestants.

Explanation: This example shows how sectarianism can lead to conflict between different religious groups. In Northern Ireland, the conflict was between Catholics and Protestants, who had different beliefs and practices. The sectarian divide was so deep that it led to violence and political unrest.

Example: The university had a sectarian policy that only admitted students from a certain religious background.

Explanation: This example shows how sectarianism can affect access to education. The university had a policy that only admitted students from a specific religious background, which could limit opportunities for students from other backgrounds. This kind of sectarian policy is not fair or inclusive.