/ ˌkɒmbɪˈneɪʃn; NAmE ˌkɑːm-/ noun
1.
[ C ] two or more things joined or mixed together to form a single unit :
His treatment was a combination of surgery, radiation and drugs.
What an unusual combination of flavours!
Technology and good management. That's a winning combination (= one that will certainly be successful) .
2.
[ U ] the act of joining or mixing together two or more things to form a single unit :
The firm is working on a new product in combination with several overseas partners.
These paints can be used individually or in combination.
3.
[ C ] a series of numbers or letters used to open a combination lock :
I can't remember the combination.
4.
combinations ( BrE ) [ pl. ] a piece of underwear covering the body and legs, worn in the past
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WORD ORIGIN
late Middle English : from late Latin combinatio(n-) , from the verb combinare join two by two, from com- together + Latin bini two together.