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English definition of “certain”

certain

adjective (EXTREMELY LIKELY)    /ˈsɜː.tən/ US  /ˈsɝː-/
B1 impossible to avoid or extremely likely: [+ to infinitive] The population explosion is certain to cause widespread famine. Oil prices are certain to rise following the agreement to limit production. After all his hard work, he's certain to pass his exams. The team looks almost certain to win the match. [+ (that)] It is virtually certain (that) she will win the gold medal. Even if a ceasefire can be agreed, how can they make certain (that) neither side breaks it? Cancer sufferers no longer face certain death as they once did. This scandal will mean certain defeat for the party in the election.InevitableCertaintyConfidence and self-assurancePossible and probable
(Definition of certain adjective (EXTREMELY LIKELY) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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