combination >> /ˌkɑmbəˈneɪʃ(ə)n/
Definition: [noun] A joining or merging of different parts or qualities in which the component elements are individually distinct.
Example: this color combination is stunningly effective
Definition: [noun] A sequence of numbers or letters used to open a combination lock.
Example: a combination briefcase
Definition: [noun] A selection of a given number of elements from a larger number without regard to their arrangement.
Example: His final publication was on combinations where he used the notation (m, n) for the combinations of n objects selected from m objects.