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.

"I like the fact that in space, we are committed to bold goals to the extent that we will not let periodic failure stop our forward progress," he said.

From BBC • Apr. 2, 2026

Some funds aimed at retail investors allow periodic redemptions up to a certain cap.

From The Wall Street Journal • Mar. 29, 2026

The explanation traces back to work by the French mathematician Gaston Floquet, who showed in the 19th century that systems exposed to periodic forces can develop entirely new oscillation states.

From Science Daily • Mar. 27, 2026

Proton’s open-source apps are subject to periodic security audits, which play a role in shaping Proton VPN’s development.

From Salon • Mar. 21, 2026

For this reason it is considered important to make periodic examinations of the blood of spray operators and others regularly exposed.

From "Silent Spring" by Rachel Carson

Vocabulary lists containing periodic

Freak the Mighty

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Essential English Vocabulary, List 3

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