Improve ( poker )

1) Better a hand, particularly catch one needed card. For example, in draw poker, you call an all-in raise
from another player to draw one card to two pair. The other player shows down a small straight.
You show that you made a full house, with the comment, "I improved." Also, help.

2) Have a specific hand made in a stud or hold 'em-type game, and then, upon the appearance
of another card, make a better hand. For example, your first five cards in seven-stud are 10s 9s 3s Js 5s ,
giving you a jack-high flush. Your next card is As , causing you to improve (to an ace-high flush).