Understanding odds and outs ...

From Island of Poker:

In Poker your actions are decided by both the amount of money/chips involved and the chance to catch your draws.

A few short definitions are necessary to understand the content of this site (and any other Poker site/Poker literature).

Outs – The number of cards left in the deck that will improve your hand.

Pot Odds – The odds you get when comparing the current size of the pot vs. your next call.

Implied Odds – These odds are difficult to calculate. Implied odds are what you expect your opponents are ready to put into the pot if you draw to your hand.

http://www.islandofpoker.com/odds.aspx