I hope you don't mind, but the definition for combination still needed work, so I worked on it.
Combination: This term may refer to jumps or spins.
A jump combination is a series of two or more jumps in which the 2nd, 3rd, 4th... jumps must take off immediately from the same edge used to land the previous jump. There cannot be any turns, steps, or long pauses between the jumps in a combination. There may be turns and steps seen between jumps in a jump sequence.
A combination spin has one or more changes of position/edge/foot within a spin.