external customer
noun[C]
ukusCOMMERCE
acustomerof aproductorservicewho is not anemployeeorpartof thecompanythatsuppliesit:
Some 78% of the brewery'ssalesare toexternalcustomers, whichmeansit is not relying onvolumeinitsownpubs, and thatsalesthroughsupermarketsareimproving.
Compare
internal customer