hornhorn /hɔrn/  ●●● noun 
1
 [countable, uncountable] a hard pointed thing that grows in pairs on the heads of cows, goats, etc., or the substance this is made of2[countable] the thing in a car, truck, etc. that you push to make a sound as a warning: 
 Someone was honking/blowing a horn  (=made a noise with the horn) behind him.3[countable] eng. lang. arts a trumpet
                                            
                                        
