Ask the Chatbot Games & Quizzes History & Society Science & Tech Biographies Animals & Nature Geography & Travel Arts & Culture ProCon Money Videos
lockdown
Table of Contents
References & Edit History Related Topics
Images
Grief at Columbine
Related Questions
Read Next
Aspirin pills.
7 Drugs that Changed the World
Photo of the antacid Tums
How Do Antacids Work?
Blackboard inscribed with scientific formulas and calculations in physics and mathematics
The World Science Festival’s Pioneers in Science
People wearing surgical masks (also called face mask or medical masks or safety masks) walk through the city center of Milan, Italy on Feb. 23, 2020. Coronavirus disease COVID-19 pandemic
How Do Face Masks Control the Spread of Disease?
Laboratory glassware (beakers)
5 Quizzes That Will Tell You Whether You Should Have Been a Scientist
Discover
illustration of the walking titanosaurus, Patagotitan mayorum
Titanosaurs: 8 of the World's Biggest Dinosaurs
Rural Irish landscape, Sligo, Ireland.
Why Is Ireland Two Countries?
Battle of the Alamo from "Texas: An Epitome of Texas History from the Filibustering and Revolutionary Eras to the Independence of the Republic, 1897. Texas Revolution, Texas revolt, Texas independence, Texas history.
6 Wars of Independence
Hemp (Cannabis sativa).
9 Mind-Altering Plants
Groups of depositors in front of the closed American Union Bank, New York City. April 26, 1932. Great Depression run on bank crowd
Causes of the Great Depression
Ahura Mazda - relief of the Zoroastrian god Ahura Mazda at the ancient ruins of Persepolis in Iran. Also known as Ormazd Zoroastrianism,
Which Religion Is the Oldest?
Fish. Lionfish. Lion-fish. Turkey fish. Fire-fish. Red lionfish. Pterois volitans. Venomous fin spines. Coral reefs. Underwater. Ocean. Red lionfish swims by seaweed.
10 of the World’s Most Dangerous Fish

lockdown: Related Content

verifiedCite
While every effort has been made to follow citation style rules, there may be some discrepancies. Please refer to the appropriate style manual or other sources if you have any questions.
Select Citation Style
Share
Share to social media
URL
https://www.britannica.com/facts/lockdown
Written and fact-checked by
The Information Architects of Encyclopaedia Britannica

The Information Architects maintain a master list of the topics included in the corpus of  Encyclopædia Britannica, and create and manage the relationships between them.
The Information Architects of Encyclopaedia Britannica

Photos

Grief at Columbine
See All Images →

Related Topics and References

Topics