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population pyramid

American

noun

Sociology.

a graph showing the distribution of a population by sex or gender, age, etc., the depiction of which is typically pyramid-shaped.

population pyramid British

noun

a pyramid-shaped diagram illustrating the age distribution of a population: the youngest are represented by a rectangle at the base, the oldest by one at the apex

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of population pyramid

First recorded in 1945–50

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

While our population pyramid is inverting, people who reach age 65 are now expected to live for at least another 20 years.

From MarketWatch • Nov. 25, 2025

Over the next 18 years, they will continue to age, and the country’s population pyramid will grow increasingly vase-shaped.

From Slate • Dec. 28, 2017

An influx of young immigrants would act as a vehicle for rejuvenating its population pyramid.

From Slate • Nov. 16, 2016

It shows what's known as a population pyramid at each census from 1901 to 2001.

From BBC • Feb. 2, 2012

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023