Definition of "dong"

dong¹

/dɒŋ/

noun
plural dong or dongs
1. The currency of Vietnam, 100 xus. Symbol: ₫
2. (historical) The currency of South Vietnam, 100 xus. Symbol: Đ.

dong²

/dɒŋ/

noun
plural dongs
1. (slang) The penis.
  Quotations
  "That American girl was after you too, wasn't she?""She didn't mean anything she said. She was just after your dong. But it's mine.""For sure, Mary."
  1955, J P Donleavy, The Ginger Man, published 1955 (France), page 344
  Nevertheless, I was wholly incapable of keeping my paws from my dong once it started the climb up my belly.
  1969, Philip Roth, Portnoy’s Complaint, page 18
  Isn't it awfully nice to have a penis?Isn't it frightfully good to have a dong?
  1983, “Penis Song”, in Monty Python's The Meaning of Life
2. (slang, by extension) A dildo, specifically a synthetic anatomical replica of the penis.

dong³

/dɒŋ/

noun
plural dongs
1. A low-pitched, metallic ringing sound.
verb
third-person singular simple present dongs, present participle donging, simple past and past participle donged
1. To make a low-pitched, metallic ringing sound.

dong⁴

/dɒŋ/

noun
plural dongs
1. A submunicipal administrative unit of a city in North or South Korea.