combination

Etymology

PIE word *dwóh₁ From Middle English combinacioun, combynacyoun, from Old French combination, from Late Latin combīnātiō. Morphologically combine + -ation

noun

1. The act of combining, the state of being combined or the result of combining.
   These guidelines should be followed in combination with those given last week.
   She took a dangerous combination of alcohol and heroin.
2. An object formed by combining.
3. A sequence of numbers or letters used to open a combination lock.
   The combination to their safe was the date of birth of their first child.
4. (mathematics) One or more elements selected from a set without regard to the order of selection.
5. An association or alliance of people for some common purpose.
6. (billiards) A combination shot; a billiard; a shot where the cue ball hits a ball that strikes another ball on the table.
7. A motorcycle and sidecar.
8. A rapid sequence of punches or strikes in boxing or other combat sports.