Definitions

periodic

[peer-ee-od-ik] / ˌpɪər iˈɒd ɪk /

ADJECTIVE

at fixed intervals

Synonyms

STRONGEST

annual intermittent monthly occasional recurrent recurring regular repeated routine seasonal sporadic weekly yearly

STRONG

periodical

WEAK

alternate at various times centennial cyclic cyclical daily epochal every once in a while every so often fluctuating hourly infrequent isochronal isochronous on certain occasions on-again-off-again orbital perennial rhythmic serial spasmodic

Antonyms

STRONGEST

constant infrequent unusual

WEAK

continual irregular lasting permanent sporadic variable

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.

"NASA and Roscosmos have been working to determine the root cause of the cracks, and Roscosmos manages the issue through operational mitigation measures and periodic partial-repair efforts," she said.

From Barron's • Jun. 5, 2026

Ang’s results are driven mainly by taxes on dividends and on periodic capital gains within the index fund as its membership changed over time.

From The Wall Street Journal • May 29, 2026

Granted, rebalancing is one of those periodic chores that’s easy to neglect, like dusting your refrigerator coils.

From Barron's • May 28, 2026

Preston pointed out that despite the periodic divergences and the Dow’s old-school image, the index has actually changed dramatically over the decades so as to “reflect and capture” the stock market’s trends.

From MarketWatch • May 26, 2026

Countless similar oddities result from our conventional ways of measuring, reporting, and com paring periodic quantities, whether they be the monthly cash flow of a government or the regular daily fluctuations in body temperature.

From "Innumeracy: Mathematical Illiteracy and Its Consequences" by John Allen Paulos

Vocabulary lists containing periodic

Freak the Mighty

Looking to grow your vocabulary? Check out this interactive, curated word list from our team of English language specialists at Vocabulary.com – one of over 17,000 lists we've built to help learners worldwide!

Word Generation Science - Introductory Chemistry Concepts

Interested in learning more words like this one? Our team at Vocabulary.com has got you covered! You can review flashcards, quiz yourself, practice spelling, and more – and it's all completely free to use!

Essential English Vocabulary, List 3

Want to remember this word for good? Start your learning journey today with our library of interactive, themed word lists built by the experts at Vocabulary.com – we'll help you make the most of your study time!