Tennis. a device of the match, consisting of a group of not fewer than 6 games which has a margin of no less than two video games in between the winner and loser.b : to bend somewhat the tooth points of (a noticed) alternately in reverse Instructions c : to sink (The top of a nail) underneath the floorB?t k? ai ?ang kinh doanh khi b?t ??u n?m m?i ?