-ing1 Syllabification: (-ing)Pronunciation: /iNG/Definition of -ing suffix 1denoting a verbal action, an instance of this, or its result:fighting outing building denoting a verbal action relating to an occupation, skill, etc.:banking ice skating welding 2denoting material used for or associated with a process, etc.:cladding piping denoting something involved in an action or process but with no corresponding verb:scaffolding 3forming the gerund of verbs (such as painting as in I love painting). Origin: Old English -ung, -ing, of Germanic origin-ing in other Oxford dictionaries Definition of -ing in the British & World English dictionary