From Longman Dictionary of Contemporary EnglishWindowsWin·dows /ˈwɪndəʊz $ -doʊz/ trademark a type of operating system for computers, produced by the Microsoft Corporation, which allows users to run several programs at the same time in separate areas of the computer screen. From Longman Business DictionaryWindowsWin‧dows /ˈwɪndəʊz-doʊz/ noun [uncountable] trademarkCOMPUTING a system produced by the Microsoft Corporation for organizing information on a personal computer, which can run several programs in separate areas of the computer screenMost of today’s software is designed for Windows.the latest version of Windows