His moodiness may have been caused by his poor health.
The blast caused extensive damage, shattering the ground-floor windows.
The drop was caused partly by the pound's strength against the dollar.
But it is hard to say which caused which.
This is often caused by enlarged tonsils and adenoids.
It's caused by washing your hair too often.
The cause of an event, usually a bad event, is the thing that makes it happen.
Smoking is the biggest preventable cause of death and disease...
The causes are a complex blend of local and national tensions.
To cause something, usually something bad, means to make it happen.
Attempts to limit family size among some minorities are likely to cause problems...
This was a genuine mistake, but it did cause me some worry.
...a protein that gets into animal cells and attacks other proteins, causing disease to spread.
...the damage to Romanian democracy caused by events of the past few days.
If you have cause for a particular feeling or action, you have good reasons for feeling it or doing it.
Only a few people can find any cause for celebration...
Both had much cause to be grateful for the secretiveness of government in Britain.
A cause is an aim or principle which a group of people supports or is fighting for.
Refusing to have one leader has not helped the cause.
You use cause and effect to talk about the way in which one thing is caused by another.
...fundamental laws of biological cause and effect.
If one group of people makes common cause with another, they act together in order to achieve a particular aim even though their aims and beliefs are normally very different.
They make common cause for a few purposes, but for the most part, they pursue their own interests.
If you say that something is in a good cause or for a good cause, you mean that it is worth doing or giving to because it will help other people, for example by raising money for charity.
The Raleigh International Bike Ride is open to anyone who wants to raise money for a good cause.