Definition of documentations:
(n) :
Something transposed from a thought to a document; the written account of an idea.
(n) :
Documentary evidence and sources.
(n) :
(computing, mechanical engineering) Documents that explain the operation of a particular machine or software program.
(n) :
(programming) Comments that explain the usage of individual functions, libraries and blocks of code.
(n) :
(non-native speakers' English) A documentary.