used to say that something is likely to happen or to be true You're probably right. It'll probably be OK. It was the best known and probably the most popular of her songs. ‘Is he going to be there?’ ‘Probably.’ ‘Do we need the car?’ ‘Probably not.’ As you probably know, I'm going to be changing jobs soon. The two cases are most probably connected. Language BankperhapsMaking an opinion sound less definite Most cybercrime involves traditional crimes, such as theft and fraud, being committed in new ways. Phishing is perhaps/possibly/probably the best-known example of this. It seems/appears that the more personal data which organizations collect, the more opportunity there is for this data to be lost or stolen. It seems clear that introducing national ID cards would do little to prevent identity theft. It could be argued that the introduction of national ID cards might actually make identity theft easier. It is possible that/It may be that the only way to protect ourselves against DNA identity theft is to avoid the creation of national DNA databases.Extra examples As you probably know, I’m going to be changing jobs soon. It’ll probably be OK. You’re probably right.