Click any word in a definition or example to find the entry for that word
I think she's called Monica, but I'm not sure.
Are you sure these figures are right?
I was sure that I had left my keys on the counter.
If you're really sure about the facts, we'll publish them.
No one is really sure why he resigned.
I'm pretty sure the pool is open until 6.00.
If you get drunk tonight, you're sure to feel rotten in the morning.
Everyone thought it was a sure thing, and we were amazed when they pulled out.
One thing is for sure, I'm never going skydiving again!
a sure command of the facts
a sure memory for names
The increase in new home sales is a sure sign the recession is over.
the most usual way of saying that you are sure about something
a stronger, more emphatic way of expressing certainty
used for expressing certainty that something will happen, based on a strong feeling rather than on facts
used informally to show that you are confident about the truth of what you are saying
a more formal way of expressing certainty about what someone is thinking or feeling, often used by people in authority
a way of expressing certainty about the facts of a situation, often used in official situations
used when you are not completely certain about something
an informal way of saying that you are not certain about something
a more formal way of saying that you are not certain about something
used for saying what you think is true, though you cannot be certain because you do not know all of the facts
used for saying that it is impossible for anyone to be certain about something
This is the British English definition of sure. View American English definition of sure.
a substance that scientists think exists out in space, but for which they have no direct proof