1. to discuss or explain something at excessive length or in too much detail
Usage: often implies tedious repetition
2. to attack or beat someone repeatedly
Usage: formal or literary

Examples

• The professor belabors every minor point in his lectures.
• She belabors the obvious instead of moving on to new topics.
• Don’t belabor the issue – we all understand your position.
• The critic belabors the film’s flaws without mentioning its strengths.
• He belabors his opponent with harsh criticism.
• The speaker belabors each argument until the audience loses interest.