Which term best describes the banning of a person from practicing religion in a particular church?

Excommunication.

Explanation:

Excommunication can be defined as an act which typically involves the banning of a person from practicing religion in a particular church.

This ultimately implies that, the individual who was banned is completely denied access or prohibited from entering and engaging in any activity such as taking communion, sacrament, holding any position, ecclesiastical function or fellowship with the other brethrens in the particular church.

Generally, the reason for the excommunication of a person is usually as a result of some of the following; questioning the church, committing sacrilegious acts, engaging in sins, breaking rules etc.

In order to be reinstated as a bonafide member of the church, the individual must show a sign of repentance, renewal of obedience, or a profession of the creed in a catholic church.

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explanation:

a trial judge has broad powers in his courtroom. the judge's decision is usually final for the duration of the trial, and the party's one special type of witness is an expert witness.