The state of having too many people or things in a space, causing uncomfortable or dangerous conditions.
From 'over-' (excessive, too much) + 'crowding' (gathering of many together). 'Crowd' comes from Old English 'crudan' meaning 'to push.'
Overcrowding in animal studies shows something eerie: animals in overcrowded conditions become aggressive and stop reproducing, suggesting that even humans have invisible psychological limits, and cities pushing population density might be hitting those limits.
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