periodic

adjective

pe·​ri·​od·​ic ˌpir-ē-ˈä-dik 

1

a

: occurring or recurring at regular intervals

b

: occurring repeatedly from time to time

2

a

: 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

Synonyms

• constant
• frequent
• habitual
• periodical
• regular
• repeated
• steady

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

The company remains subject to the periodic reporting requirements of the Exchange Act. —Quartz Bot, Quartz, 14 Nov. 2024

America has periodic eruptions of political unrest, Ellis argued, but none has come close to a civil war. —Charles Bethea, The New Yorker, 4 Nov. 2024

On top of the periodic rattle of the transit trains and roar of sports fans, there’s the intrusion of illicit activities that keep him awake. —Jovi Dai, The Mercury News, 2 Nov. 2024

The project, which is designed to include periodic nourishments every five to seven years for 50 years, got off to a rocky start when an original dredge location was delivering more rocks and pebbles than expected and a new borrow location had to be found. —Laylan Connelly, Orange County Register, 31 Oct. 2024

Word History

First Known Use

1650, in the meaning defined at sense 1a

Phrases Containing periodic

• periodic acid
• periodic law
• periodic sentence
• periodic table

Kids Definition

periodic

adjective

pe·​ri·​od·​ic ˌpir-ē-ˈäd-ik 

1

: occurring at regular intervals

2

: consisting of or containing a series of repeated stages

periodic vibrations

Medical Definition

periodic

adjective

pe·​ri·​od·​ic ˌpir-ē-ˈäd-ik 

: occurring or recurring at regular intervals

periodic epidemics