A list of the possible hands and how they rank, together with a short definition:
The highest ranked card is an Ace, and the ranking runs from the Ace down through the picture cards all the way to 2.
Any two cards of the same rank, for example two Jacks. The ranking of pairs mirrors that of the high card.
Two sets of cards of the same rank, for example two 10's and two 8's.
Three cards of the same rank, for example three 5's.
Five cards in sequential rank order, for example 7, 8, 9, 10 and a Jack. An ace counts as high or low card.
Five cards of the same suit, for example five diamonds.
A combination of three of a kind and a pair. For example three 7's and two 10's.
Four cards of the same rank, for example four Kings.
A straight (see above) but with all the cards in the same suit.
The mother of all poker hands, a royal flush is a straight flush involving the Ace, King, Queen, Jack and 10.