Definition of overstore:
(v) :
To open more stores than the retail market needs.
(n) :
An instance of overstoring, a surplus.
(n) :
The opening of too many stores or stores that are too large.
(v) :
To overstock; to save more than is needed.
(v) :
(computing) To overwrite memory or storage.
(n) :
(computing) The overwriting of memory or data, especially when done in error.