Back نظام مغلق Arabic Затворена система Bulgarian Sistema tancat Catalan Uzavřená soustava Czech Geschlossenes System German Κλειστό σύστημα Greek Sistema cerrado Spanish Suletud süsteem (füüsika) Estonian Sistema itxi Basque سامانه بسته Persian
A closed system is a natural physical system that does not allow transfer of matter in or out of the system, although – in the contexts of physics, chemistry, engineering, etc. – the transfer of energy (e.g. as work or heat) is allowed.