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