From Longman Dictionary of Contemporary Englishopen-planˌopen-ˈplan adjective British English TBAAan open-plan office, school etc does not have walls dividing it into separate rooms
Examples from the Corpus
open-plan• Recently refurbished, the lounge-bar and dining-room are open-plan and the food served is simple.• They shared a cramped open-plan area in which they were disposed rather in the manner of a traditional typing pool.• There's little else to the accommodation apart from an open-plan head to the starboard and a small galley opposite.• Here we illustrated numerous dramatic conversions of warehouses and textile mills whose open-plan layouts made them adaptable for virtually any purpose.• The symbol of the new age is the new Euston, an all-purpose combination of airport lounge and open-plan public lavatory.• With 29 metres between east and west window elevations, the building was not ideal for open-plan studios.• Better still, off-street markets in open-plan warehouses, which have a roof, if not much else.From Longman Business Dictionaryopen-planˈopen-plan adjective open-plan offices, work areas etc do not have walls dividing them into separate roomsFinancial institutions want large, open-plan floors. 