'item-by-item' definitions:

Definition of 'item-by-item'

From: WordNet
adjective
Separate and distinct from others of the same kind; "mark the individual pages"; "on a case-by-case basis" [syn: individual, case-by-case, item-by-item]

Definition of 'item-by-item'

From: GCIDE
  • item-by-item \item-by-item\ adj. considered one item at a time; -- contrasted with using general rules for groups of items considered by their class. [WordNet 1.5]