barking UK /ˈbɑːkɪŋ/US /ˈbɑɹkɪŋ/noun 1adjective 1forms 1 noun1 •The action of the verb to bark. adjective1 •(UK, slang) Clipping of barking mad.He’s going to run the marathon in this hot weather dressed as Donald Duck – he must be barking! formsbarkings