We found 20 dictionaries that define the word buttoned up:

General (14 matching dictionaries)

1. buttoned-up: Merriam-Webster
2. buttoned-up: Oxford Learner's Dictionaries
3. buttoned up: Collins English Dictionary
4. buttoned-up, buttoned up: Vocabulary.com
5. buttoned-up: Wordnik
6. buttoned-up, buttoned up: Wiktionary
7. buttoned-up: Infoplease Dictionary
8. buttoned-up, buttoned up: Dictionary.com
9. buttoned-up: Rhymezone
10. buttoned-up: FreeDictionary.org
11. buttoned-up: Mnemonic Dictionary
12. buttoned-up, buttoned up: TheFreeDictionary.com
13. buttoned up: Longman Dictionary of Contemporary English

Business (1 matching dictionary)

14. buttoned up: Legal dictionary

Computing (1 matching dictionary)

15. buttoned up: Encyclopedia

Medicine (1 matching dictionary)

16. buttoned up: Medical dictionary

Miscellaneous (1 matching dictionary)

17. buttoned up: Idioms

Slang (2 matching dictionaries)

18. buttoned up: Green’s Dictionary of Slang
19. buttoned up: Urban Dictionary

Definitions from Wiktionary (Buttoned up) ▸ adjective:  Alternative form of buttoned-up [(figurative) Conservative.] Similar: taciturn, conservative, buttoned-down, buttondown, up-tight, tuniced, highnecked, trousersed, dogged up, jack-booted, more... Opposite: unbuttoned, undone, relaxed, casual, informal ▸ Words similar to buttoned up ▸ Usage examples for buttoned up ▸ Idioms related to buttoned up ▸ Wikipedia articles (New!) ▸ Popular nouns described by buttoned up ▸ Words that often appear near buttoned up ▸ Rhymes of buttoned up ▸ Invented words related to buttoned up