Puts are right to sell the share at a certain price at a given...

Puts are right to sell the share at a certain price at a given date.

The buy of the put can use it to put the share in someone elses hands. The seller of the put is the one that ends up buying those shares.

The dates are the option expiry dates.
Price is whatever they want (usually in 25c increments)
for OXR

http://en.wikipedia.org/wiki/Option_(finance)