1.To form a union; to agree; to coalesce; to confederate. "You with your foes combine, And seem your own destruction to design" "So sweet did harp and voice combine."
2.To unite by affinity or natural attraction; as, two substances, which will not combine of themselves, may be made to combine by the intervention of a third.
3.(Card Playing) In the game of casino, to play a card which will take two or more cards whose aggregate number of pips equals those of the card played.
