Noun | 1. | lie-in - a long stay in bed in the morning repose, rest, ease, relaxation - freedom from activity (work or strain or responsibility); "took his repose by the swimming pool" 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 |