(n): the food served and eaten at one time
(n): assembling in proper numerical or logical sequence
(n): the act of gathering something together
(n): careful examination and comparison to note points of disagreement
(n): the act of examining resemblances
"...since the Captain had missed his dinner, did he choose to take a cold collation in the gunroom?"
--Patrick O'Brian, The Nutmeg of Consolation, 167
In rare/antique books, to collate is to checking for the presence of every leaf and page that was in the volume when originally issued. If all are present, a book is said to have been collated as complete.