Excessive population of an area to the point of overcrowding, depletion of natural resources, or environmental deterioration.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "overpopulation" in a sentence
"Outside of Africa and the Arab world (with the exception of Lebanon), overpopulation is one problem we are well on our way to conquering."
"At least here and in most states with a ton of deer overpopulation is the most dangerous problem facing the herd."
"Sarah Palin has five kids, so she doesn't think human overpopulation is a problem obviously."