Straight flush, five cards of the same suit in sequence, such as 76543 of hearts. Rated by the top poker card, so that AKQJT is the best straight flush, also called a royal flush. The ace can play low to make 5432A, the lowest straight flush.
Four of a kind, four poker cards of the same rank accommodated by a "kicker", like 44442. Ranked by the quads, so that 44442 beats 3333K, and then ranked by the side poker card, so that 4444A beats 4444K (*) .
Full house, three poker cards of one rank accommodated by two of another, such as 777JJ. Rated by the trips, so that 44422 beats 333AA, and then ranked by the pair, so that 444AA beats 444KK (*).
Flush, five poker cards of the same suit, such as AJ942 of hearts. Ranked by the top poker card, and then by the next poker card, and so on for all five poker cards, so that AJ942 beats AJ876. Suits are not used to break ties.
Straight, five poker cards in sequence, such as 76543. The ace plays either high or low, making AKQJT and 5432A. "Around the corner" straights like 32AKQ are usually not allowed.
Three of a kind, three poker cards of the same rank and two kickers of different ranks, such as KKK84. Rated by the trips, so that KKK84 beats QQQAK, and then ranked by the two kickers, so that QQQAK beats QQQA7 (*).
Two pair, two poker cards of one rank, two poker cards of another rank and a kicker of a third rank, such as KK449. Rated by the top pair, then the bottom pair and finally the kicker, so that KK449 beats any of QQJJA, KK22Q, and KK445.
One pair, two poker cards of one rank accepted by three kickers of different ranks, such as AAK53. Ranked by the pair, followed by each kicker in turn, so that AAK53 beats AAK52.
High card, any poker hands that does not qualify as one of the better hands above, such as KJ542 of mixed suits. Ranked by the top poker card, then the second poker card and so on for all five poker cards, as for flushes. Suits are not used to break ties ..