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Definitions

yearlong

[yeer-lawng, -long] / ˈyɪərˈlɔŋ, -ˈlɒŋ /
ADJECTIVE
annual
Synonyms
WEAK
a year's worth
ADJECTIVE
perennial
Synonyms
STRONGEST
chronic continual continuing eternal longstanding never-ending persistent recurrent seasonal
STRONG
annual constant everlasting immortal old permanent yearly
WEAK
abiding ceaseless deathless durable imperishable incessant inveterate lasting lifelong long-lasting long-lived perdurable sustained unceasing unchanging undying unfailing uninterrupted
Antonyms
STRONGEST
ceasing ending halting infrequent intermittent interrupted occasional temporary
STRONG
concluding ephemeral terminating
WEAK
changing
ADJECTIVE
yearly
Synonyms
STRONGEST
annual annually regularly
STRONG
perennial
WEAK
once a year per annum year by year

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.

If confirmed, this world could become the first Earth-size exoplanet in a yearlong orbit that passes in front of a nearby, bright Sun-like star, making it an especially valuable target for follow-up research.

From Science Daily • Feb. 12, 2026

Gaga’s Grammy performance comes in the middle of her nearly yearlong Mayhem Ball tour, which will end in April.

From Los Angeles Times • Feb. 1, 2026

In “The Cradle of Citizenship,” Mr. Traub relates his yearlong exploration of the politically contested ground of the American classroom, which remains, he writes, one of the few “civic levers” we have left to pull.

From The Wall Street Journal • Jan. 16, 2026

Micron gained 239% in 2025, making it the second-best performer in the S&P 500 among yearlong constituents.

From Barron's • Jan. 2, 2026

If it were a nightmare, it would have to have started somewhere before I got bad; it would be like a yearlong dream.

From "It’s Kind of a Funny Story" by Ned Vizzini