wastebasket noun 2verb 1forms 3 noun2 •A usually small indoor receptacle for items that are to be discarded; a rubbish bin. •(figurative) Any region or grouping that is worthless or meaningless.The order Insectivora provides such a taxonomic wastebasket in classifications of the placental mammals. — 2017 verb1 •To discard in a wastebasket.I was aweary, aweary, and I put it in the waste basket. Ten days later the bill came again, and with it a shadowy threat. I waste-basketed it. — 1924 formswastebasketed · wastebasketing · wastebaskets