What does the term "Repo Rate" refer to in the Indian economy?

If the interest rate is decreased in an economy, it will :

In India the Repo rate is announced by

When the Reserve Bank of India announces an increase of the Cash Reserve Ratio, what does it mean?

In India, the key policy interest rate (Repo Rate) is decided by which authority?

The rate at which banks lend to Reserve Bank of India is known as :