1. all the people living in a particular area, country, or region
Usage: plural of population
2. groups of organisms of the same species living in particular areas
Usage: biology; plural of population
3. particular groups within a larger population sharing common characteristics
Usage: statistics; demographics; plural of population

Examples

• Urban populations are growing rapidly in developing countries.
• The census tracks populations in different regions every ten years.
• Scientists study bird populations to understand migration patterns.
• Fish populations in the lake have declined due to pollution.
• The study compared populations of different age groups.
• Rural populations often have different needs than city dwellers.
• Whale populations are slowly recovering after hunting bans.
• The survey included populations from various ethnic backgrounds.