We found 34 dictionaries that define the word twice:

General (27 matching dictionaries)

1. twice: Longman Dictionary of Contemporary English
2. twice: Merriam-Webster
3. twice: Oxford Learner's Dictionaries
4. twice: American Heritage Dictionary of the English Language
5. twice: Collins English Dictionary
6. twice: Vocabulary.com
7. Twice, twice: Wordnik
8. twice: Cambridge Advanced Learner's Dictionary
9. twice: Wiktionary
10. twice: Webster's New World College Dictionary, 4th Ed.
11. twice: The Wordsmyth English Dictionary-Thesaurus
12. twice: Infoplease Dictionary
13. twice: Dictionary.com
14. twice: Online Etymology Dictionary
15. twice: Cambridge Essential American English Dictionary
16. Twice (Christina Aguilera song), Twice (Hollie Cook album), Twice (My Hero Academia), Twice (The Tyde album), Twice (Twice album), Twice (band), Twice (group), Twice (magazine), Twice (online retailer), Twice (song), Twice: Wikipedia, the Free Encyclopedia
17. Twice: Online Plain Text English Dictionary
18. twice: Webster's Revised Unabridged, 1913 Edition
19. twice: Rhymezone
20. twice: AllWords.com Multi-Lingual Dictionary
21. twice: Webster's 1828 Dictionary
22. twice: FreeDictionary.org
23. twice: Mnemonic Dictionary
24. twice: TheFreeDictionary.com
25. twice: Wikimedia Commons US English Pronunciations

Computing (1 matching dictionary)

26. twice: Encyclopedia

Medicine (1 matching dictionary)

27. online medical dictionary (No longer online)

Miscellaneous (2 matching dictionaries)

28. TWICE: Acronym Finder
29. twice: Idioms

Science (1 matching dictionary)

30. twice: MATH SPOKEN HERE!

Slang (2 matching dictionaries)

31. twice: Green’s Dictionary of Slang
32. Twice: Urban Dictionary

Definitions from Wiktionary ( ) ▸ adverb:  Two times. ▸ adverb:  (usually with "as", of a specified quality) Doubled in quantity, intensity, or degree. Similar: doubly, double, thrice, once, again, nearly, last, regularly, consecutively, same, more... Opposite: once, singly, individually, alone, solo Types: once, thrice, four times, five times, six times, seven times, eight times, nine times, ten times, more... Phrases: think twice, twice weekly, twice yearly, twice married, twice removed, more... Adjectives: same, live, think, better, diluted, how, sweet Colors:     pink,     purple,     yellow,     blue,     green, more... ▸ Word origin ▸ Words similar to twice ▸ Usage examples for twice ▸ Idioms related to twice ▸ Wikipedia articles (New!) ▸ Words that often appear near twice ▸ Rhymes of twice ▸ Invented words related to twice