COMBINATION

[noun] [C]A combination is a mixture obtained when two or more things are combined.Green is a combination of blue and yellow.A combination of tiredness and boredom caused me to fall asleep in the middle of his lecture.Her experience and energy are a winning combination (= successful mixture) in business.(specialized) A combination is also an arrangement in a different order.From the letters X Y Z, we can get three combinations of two letters: XY, XZ, and YZA combination is also a set of letters or numbers in a particular order which can be used to open some types of locks.I've been trying to open the safe but I can't remember the combination.I have a combination lock on my locker in the changing room.See picture: LuggageIn combination (with) means together (with).We'll be working in combination with another company on this project.On their own they work well, but in combination they're a disaster.