Definition of backorder in US English:

backorder

noun

  • A retailer's order for a product that is temporarily out of stock with the supplier.

    ‘the phone I wanted was on backorder’

verb

[with object]
  • Place an order for (a product) that is temporarily out of stock.

    ‘the item was backordered by our distributor’
    ‘the taps can be backordered and take up to three months for delivery’

Pronunciation

backorder

/ˈbakˌôrdər/