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Synonyms

unforeseen

British  
/ ˌʌnfɔːˈsiːn /

adjective

  1. not seen or known beforehand; unanticipated

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Explanation

Something unforeseen is something that could not be predicted and was not expected. It's a surprise. If something was foreseen, you saw it coming and it wasn't a surprise. Something unforeseen is the opposite: no one saw it coming. Accidents are usually unforeseen events: no one expects to get in a car or bike accident on a given day. Winning the lottery, since it's so unlikely, would be an unforeseen event. If something was unanticipated or out of the blue, it was unforeseen. Unforeseen events can be good or bad, but they’re all surprises.

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Vocabulary lists containing unforeseen

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.

Investors get exposure to a strong freight rate market and a balance sheet that protects you in case something unforeseen happens.

From Barron's • Apr. 22, 2026

Not only can the word cure generate expectations that may not be met and engender disappointment, he says, but it could also have unforeseen practical implications.

From Slate • Mar. 29, 2026

It encapsulates the well-founded belief that starting a war is likely to create unforeseen evils greater than the evil of the status quo.

From Salon • Mar. 14, 2026

Drake played two shows at Manchester's Co-Op Live Arena last July, but a third was postponed at the last minute due to "unforeseen ferry schedule and travel logistics".

From BBC • Mar. 13, 2026

A greater obstacle, as impassable as it was unforeseen, obliged a new and indefinite postponement.

From "One Hundred Years of Solitude" by Gabriel Garcia Marquez