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.

Thafer said, referring to the strategy of repeated, periodic attacks.

From Barron's • Apr. 24, 2026

The Department of Homeland Security hasn’t published any national terrorism advisory bulletins, periodic updates to alert the public to the current threat level, since September.

From Salon • Apr. 22, 2026

It requires periodic delimitation - the redrawing and reallocation of seats - after each census to reflect updated population figures.

From BBC • Apr. 16, 2026

Its unique value is one of accumulated histories, preserved from one administration to the next despite periodic changes, which have sometimes been extreme.

From The Wall Street Journal • Apr. 10, 2026

“Try me. First nine elements of the periodic table. Go.”

From "What If It's Us" by Becky Albertalli and Adam Silvera

Vocabulary lists containing periodic

Freak the Mighty

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Word Generation Science - Introductory Chemistry Concepts

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Essential English Vocabulary, List 3

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