Definition of plexes:
(n) :
(Canada) A building, such as a duplex or triplex, with a number of apartments (typically two to four) that all open directly to the outside.
(n) :
(computing) A designated portion of a disk, usually set up to mirror some of the contents.
(n) :
(computing) A tree-like structure in which each child can have multiple parents.
(n) :
Clipping of multiplex. [A building or a place where several activities occur in multiple units concurrently or different times.]