Adj. | 1. | buttoned-up - (British colloquial) not inclined to conversation colloquialism - a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech Britain, Great Britain, U.K., UK, United Kingdom, United Kingdom of Great Britain and Northern Ireland - a monarchy in northwestern Europe occupying most of the British Isles; divided into England and Scotland and Wales and Northern Ireland; `Great Britain' is often used loosely to refer to the United Kingdom taciturn - habitually reserved and uncommunicative |
2. | buttoned-up - conservative in professional manner; "employers are looking for buttoned-up types" conservative - resistant to change |