Combination

1. n. The different arrangements of a number of objects, as letters, into groups.
2. n. The act or process of combining or uniting persons and things.
3. n. The result of combining or uniting; union of persons or things; esp. a union or alliance of persons or states to effect some purpose; — usually in a bad sense.
4. n. The act or process of uniting by chemical affinity, by which substances unite with each other in definite proportions by weight to form distinct compounds.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.