To reduce the number of members of a group, population, or organization, often by removing, dismissing, or eliminating those considered weak, redundant, or undesirable.
To reduce a population of animals or people, literally or figuratively, by culling, predation, disease, or selective removal.
2.
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To decrease numbers in a blunt or ruthless way, sometimes used as a euphemism for killing or harshly discarding individuals deemed expendable.