periodic

adjective
pe·​ri·​od·​ic | \ ˌpir-ē-ˈä-dik How to pronounce periodic (audio) \

Definition of periodic

1a : occurring or recurring at regular intervals
b : occurring repeatedly from time to time
2a : consisting of or containing a series of repeated stages, processes, or digits : cyclic periodic decimals a periodic vibration
b : being a function any value of which recurs at regular intervals
3 : expressed in or characterized by periodic sentences

Keep scrolling for more

Examples of periodic in a Sentence

He takes the car in for periodic oil changes. sent out periodic reminders about the office dress code
Recent Examples on the Web Pilots are at a unique risk because adverse reactions to a vaccine could affect their ability to pass periodic medical examinations required to maintain their license. Time, 17 Oct. 2021 Just before the decision was made to close the road, dump trucks were delivering dozens of loads of gravel to the site each week, with periodic breaks to allow buses through. Nat Herz, Anchorage Daily News, 17 Oct. 2021 COVID-19 outbreaks continue to force periodic factory shutdowns, long-haul truck drivers — and more recently, even trucks — are in short supply, and the once-reliable transoceanic shipping industry is teetering on breakdown. Don Stacom, courant.com, 15 Oct. 2021 Workers use handheld thermal cameras to inspect equipment during periodic inspections. Robert Kester, Forbes, 14 Oct. 2021 Moving away from thinking about grid cells’ periodic hexagonality could lead to many more important insights. Quanta Magazine, 14 Oct. 2021 The independent panel of disease-prevention experts analyzes medical research and literature and issues periodic advice on measures to help keep Americans healthy. orlandosentinel.com, 12 Oct. 2021 The independent panel of disease-prevention experts analyzes medical research and literature and issues periodic advice on measures to help keep Americans healthy. CBS News, 12 Oct. 2021 The conflict is taking a toll on Ethiopia’s economy, with inflation rates spiraling into double digits, while periodic disruptions to trade routes have hurt the nation’s trade amid a soaring external debt estimated at $30 billion. Nicholas Bariyo, WSJ, 12 Oct. 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'periodic.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of periodic

1650, in the meaning defined at sense 1a

Keep scrolling for more

Learn More About periodic

Time Traveler for periodic

Time Traveler

The first known use of periodic was in 1650

See more words from the same year

Dictionary Entries Near periodic

period

periodic

periodic acid

See More Nearby Entries 

Statistics for periodic

Last Updated

20 Oct 2021

Cite this Entry

“Periodic.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/periodic. Accessed 24 Oct. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon
Seen & Heard
People are talking about

Keep scrolling for more

More Definitions for periodic

periodic

adjective

English Language Learners Definition of periodic

: happening regularly over a period of time

periodic

adjective
pe·​ri·​od·​ic | \ ˌpir-ē-ˈä-dik How to pronounce periodic (audio) \

Kids Definition of periodic

: occurring regularly over a period of time

periodic

adjective
pe·​ri·​od·​ic | \ ˌpir-ē-ˈäd-ik How to pronounce periodic (audio) \

Medical Definition of periodic

: occurring or recurring at regular intervals periodic epidemics

More from Merriam-Webster on periodic

Nglish: Translation of periodic for Spanish Speakers

Britannica English: Translation of periodic for Arabic Speakers

WORD OF THE DAY

Test Your Vocabulary

Difficult Spelling Words Quiz

  • alphabet pasta spelling help
  • Which is the correct spelling?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!