protective covering consisting, for example, of a layer of boards applied to the studs and joists of a building to strengthen it and serve as a foundation for a weatherproof exterior
used of a group whose members acted or were acted upon collectively and when `all' and `together' can be separated by other words; "they were herded all together"; "they were all herded together"; "the books lay all together in a heap"; "the books all lay together..."
all at the same time; "Let's say `Yes!' all at once"
overlapping in duration; "concurrently with the conference an exhibition of things associated with Rutherford was held"; "going to school and holding a job at the same time"