We found 17 dictionaries that define the word combinations:

General (9 matching dictionaries)

1. combinations: Merriam-Webster
2. combinations: Collins English Dictionary
3. combinations: Vocabulary.com
4. Combinations, combination's, combinations: Wordnik
5. combinations: Cambridge Advanced Learner's Dictionary
6. combinations: Wiktionary
7. combinations: Dictionary.com
8. Combinations (album), Combinations: Wikipedia, the Free Encyclopedia
9. combinations: TheFreeDictionary.com

Business (3 matching dictionaries)

10. combinations: Merriam-Webster Legal Dictionary
11. Combinations: Legal dictionary
12. Combinations: Financial dictionary

Computing (1 matching dictionary)

13. combinations: Encyclopedia

Medicine (1 matching dictionary)

14. combinations: Merriam-Webster Medical Dictionary

Science (2 matching dictionaries)

15. combinations: PlanetMath Encyclopedia
16. Combinations: Fundamental Statistics for the Behavioral Sciences

Tech (1 matching dictionary)

17. FASHION AND DESIGN (No longer online)

(Note: See combination as well.)

Definitions from Wiktionary (combinations) ▸ noun:  A one-piece form of underwear, being a combination of a vest or chemise and underpants. Similar: combining, compounding, permutation, Combos, mixture, configuration, pairing, type, variation, Styles, more... Opposite: separations, divisions, disjunctions, isolations, detachments Types: permutations, more... Phrases: linear combinations, drug combinations, permutations and combinations, Combinations and permutations, more... Adjectives: various, different, possible, new, such, many, certain, linear, particular, complex, specific ▸ Words similar to combinations ▸ Usage examples for combinations ▸ Idioms related to combinations ▸ Wikipedia articles (New!) ▸ Popular adjectives describing combinations ▸ Words that often appear near combinations ▸ Rhymes of combinations ▸ Invented words related to combinations