mandatory
Americanadjective
-
authoritatively ordered; obligatory; compulsory.
It is mandatory that all students take two years of math.
-
pertaining to, of the nature of, or containing a command.
-
Law. permitting no option; not to be disregarded or modified.
a mandatory clause.
-
having received a mandate, as a nation.
noun
plural
mandatoriesadjective
-
having the nature or powers of a mandate
-
obligatory; compulsory
-
(of a state) having received a mandate over some territory
noun
Other Word Forms
- mandatorily adverb
- nonmandatory adjective
- unmandatory adjective
Etymology
Origin of mandatory
From the Late Latin word mandātōrius, dating back to 1655–65. See mandate, -tory 1
Explanation
In the US, attending school through the twelfth grade, driving on the right side of the road, and obtaining a social security number are all mandatory. The phrase "mandatory requirement" is redundant. A mandatory action is something that is required, obligatory, or compulsory. Like letting your Great Aunt Edna pinch your cheeks or passing gym to get your diploma. Mandatory is often used in opposition to optional. If you want to compete with the swim team at school, weeknight practices are mandatory, meaning you have to go, though the Saturday dawn swim practice remains optional, meaning it's up to you.
Vocabulary lists containing mandatory
List 2
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Twelve Angry Men
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All American Boys
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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.
The decline has triggered cutbacks, mandatory and voluntary.
From The Wall Street Journal • Apr. 16, 2026
The area from Van Buren Boulevard and Jurupa Road east to Stone Avenue toward Stone Elementary School and south to Paisano Way and Limonita Avenue is under mandatory evacuation orders.
From Los Angeles Times • Apr. 15, 2026
Many K-pop boy bands have faced career downturns after completing mandatory military service, in a fiercely competitive industry where momentum is hard to regain.
From Barron's • Apr. 9, 2026
The mandatory minimum sentence is 10 years in prison.
From BBC • Apr. 8, 2026
He and Shannon didn’t have mandatory basketball practice like usual, but were still going to the gym to shoot around because, well, that’s what they did every day.
From "All American Boys" by Jason Reynolds
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
