Definitions of item:

• noun:   a whole individual unit; especially when included in a list or collection

  Example: "They reduced the price on many items"

• noun:   a distinct part that can be specified separately in a group of things that could be enumerated on a list

  Example: "He noticed an item in the New York Times"

• noun:   an isolated fact that is considered separately from the whole
• noun:   an individual instance of a type of symbol
• noun:   a small part that can be considered separately from the whole
• adverb:   (used when listing or enumerating items) also

  Example: "A length of chain, item a hook-Philip Guedalla"