(noun) The act of combining, the state of being combined or the result of combining.
"Sanity and happiness are an impossible combination."
"Eating and reading are two pleasures that combine admirably."
"In battle, there are not more than two methods of attack--the direct and the indirect; yet these two in combination give rise to an endless series of maneuvers."
"There are not more than five cardinal tastes, yet combinations of them yield more flavours than can ever be tasted."
"There are not more than five musical notes, yet the combinations of these five give rise to more melodies than can ever be heard."
"There are not more than five primary colours, yet in combination they produce more hues than can ever been seen."