-ing1Pronunciation: /ɪŋ/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:sacking 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 US English dictionary