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An item that is especially noteworthy for its value, rarity, and/or history and would thus be prized by someone who collects such things. We went through my grandfather's attic and came upon a number of different collector's items, from rare toys to vintage rifles.
be an item
To be a romantic couple. I thought Luke and Andrea broke up—is it true that they're an item again?
An object of great interest, value, or rarity, as in This necklace is a collector's item. Originating in the early 1900s as collector's piece, a usage still common in Britain, the term in its present form is occasionally transferred to persons as well, as in The Beach Boys became a collector's item on the tour. [c. 1930]
be an itemINFORMAL
If two people are an item, they are having a romantic or sexual relationship. She and Gino were an item.
be an item(of a couple) be involved in an established romantic or sexual relationship. informal
1997 Independent ‘It is fair to say they are an item but they are not engaged,’ said one of Mr Brown's closest confidantes.
be an ˈitem(informal) be involved in a romantic or sexual relationship: Are they an item?
1. n. an item that sells well. This little thing is a hot item this season.
2. n. a romantically serious couple. Sam and Mary are quite a hot item lately.