D defs.my
Entry 1 sense Webster, 1913

Swan-upping

· Swan·-up·ping · IPA
01 n. A yearly expedition on the Thames to take up young swans and mark them, as by Companies of Dyers and Vintners; -- called also swan-hopping.
  1. 1.
    A yearly expedition on the Thames to take up young swans and mark them, as by Companies of Dyers and Vintners; -- called also swan-hopping.[Eng.] Also: swan-hopping