RhymeZone: horning definitions

Definitions of Horning:

name: A surname (rare: 1 in 50000 families; popularity rank in the U.S.: #4967)

noun: The activity of blowing the horn of a train.
noun: The appearance of the Moon when increasing, or in the form of a crescent.
noun: (US, historical) A mock serenade with tin horns and other discordant instruments by way of showing public disapproval.
noun: (law, Scotland) The issuing of letters of horning.
noun: A village and civil parish in Broadland district, Norfolk, England (OS grid ref TG3417).

(Definitions from Wiktionary)