combination

[ kom-buh-ney-shuhn ]

noun

1. the act of combining or the state of being combined.

   Synonyms: coalescence, union, conjunction, association

2. a number of things combined:

   a combination of ideas.

   Synonyms: amalgam, amalgamation, mixture

3. something formed by combining:

   A chord is a combination of notes.

4. an alliance of persons or parties:

   a combination in restraint of trade.

   Synonyms: conspiracy, cabal, monopoly, combine, cartel, coalition, league, federation, association, bloc

5. the set or series of numbers or letters used in setting the mechanism of a combination lock.
6. the parts of the mechanism operated by this.
7. Often combinations. a suit of underwear in one piece.
8. Mathematics.
   1. the arrangement of elements into various groups without regard to their order in the group.
   2. a group thus formed. Compare permutation ( def 1 ).

combination

/ ˌkɒmbɪˈneɪʃən /

noun

1. the act of combining or state of being combined
2. a union of separate parts, qualities, etc
3. an alliance of people or parties; group having a common purpose
4. 1. the set of numbers that opens a combination lock
   2. the mechanism of this type of lock
5. a motorcycle with a sidecar attached
6. maths
   1. an arrangement of the numbers, terms, etc, of a set into specified groups without regard to order in the group

      the combinations of a, b, and c, taken two at a time, are ab, bc, ac

   2. a group formed in this way. The number of combinations of n objects taken r at a time is n !/[( n – r )! r !]. Symbol: n C r Compare permutation
7. the chemical reaction of two or more compounds, usually to form one other compound
8. chess a tactical manoeuvre involving a sequence of moves and more than one piece

Derived Forms

• ˌcombiˈnational, adjective

Other Words From

• combi·nation·al adjective
• inter·combi·nation noun
• noncom·bi·nation noun
• precom·bi·nation noun
• super·combi·nation noun
• uncom·bi·nation·al adjective

Word History and Origins

Origin of combination¹

First recorded in 1350–1400; Middle English combinacyoun, from Middle French, from Late Latin combīnātiōn-, stem of combīnātiō “a joining by twos,” equivalent to combīnāt(us) “combined,” literally, “joined by twos” (past participle of combīnāre; combine ) + -iō -ion

Example Sentences

This combination of speech and brain activity data achieved an impressive 97.53 per cent accuracy in diagnosing depression, significantly outperforming alternative methods.

From Science Daily

This method constructs predictive models by sorting and combining data into groups, where they are computed in different combinations repeatedly until the best and most reliable data combination is identified.

From Science Daily

Patients may require a combination therapy regime, including surgery, chemotherapy, radiation therapy and immunotherapy, among others.

From Science Daily

The men were more than 25 miles from the blaze but a combination of high winds and smoke was enough to foul the air.

From Los Angeles Times

While much of the analysis focused on the effects of single herbicides, the team also analyzed the combination of glyphosate and fomesafen.

From Science Daily

Related Words

• combo
• consolidation
• merger
• mix
• sequence
• solution