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Definitions

sudden

[suhd-n] / ˈsʌd n /
ADJECTIVE
unexpected; happening quickly
Synonyms
STRONGEST
abrupt hasty immediate precipitous quick rapid swift unforeseen unusual
WEAK
accelerated acute expeditious fast flash fleet headlong hurried impetuous impromptu impulsive out of the blue precipitant precipitate quickened rash rushing spasmodic speeded subito
Antonyms
STRONGEST
delayed gradual lazy leisurely slow sluggish
WEAK
expected

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.

But there is nothing amusing about a sudden bout of vertigo and dizziness.

From The Wall Street Journal • Apr. 15, 2026

This leads to sudden and intense episodes of pain, swelling, and inflammation.

From Science Daily • Apr. 14, 2026

Investors watch oil prices closely as a sudden spike can lead to a recession, he said, but recent trading action highlighted optimism that the energy-supply disruption triggered by the Iran conflict might be short-lived.

From MarketWatch • Apr. 14, 2026

To win last year, McIlroy needed to beat Justin Rose - who finished tied third on Sunday having led by two at the turn - in a sudden death play-off after bogeying the 72nd hole.

From BBC • Apr. 12, 2026

‘Any sudden noise and it might wake up.’

From "Wolf Brother" by Michelle Paver