How to Pronounce "Watershed"

noun Chiefly British. the ridge or crest line dividing two drainage areas; water parting; divide. the region or area drained by a river, stream, etc.; drainage area. Architecture. wash (def. 45). an important point of division or transition between two phases, conditions, etc.: The treaty to ban war in space may prove to be one of history's great watersheds. adjective constituting a watershed: a watershed area; a watershed case.