Definition of "honk"

honk¹

/hɒŋk/

verb
third-person singular simple present honks, present participle honking, simple past and past participle honked
1. (transitive, intransitive) To use a car horn.
2. (intransitive) To make a loud, harsh sound like a car horn.
3. (intransitive) To make the vocal sound of a goose.
4. (slang) To vomit: regurgitate the contents of one's stomach.
5. (slang) To have a bad smell.
6. (informal) To squeeze playfully, usually a breast or nose.
noun
countable and uncountable, plural honks
1. The harsh note produced by a typical car horn.
  Quotations
  The operator went out on to the platform with his handlamp and waved it in the traditional "wash-out" signal across the body. The engineer had been expecting this and responded at once with an acknowledging honk on the horn before bringing this huge, 16-car train gently to a stand at the platform.
  1961 July, J. Geoffrey Todd, “Impressions of railroading in the United States:Part Two”, in Trains Illustrated, page 424
2. The cry of a goose or similar bird.
3. (slang) A bad smell.
interjection
1. Imitation of car horn, used, for example, to clear a path for oneself.