Alteration/ˌɔːltəˈreɪʃn/ Definition 1 of 4Pro Tip 1/2Widespread Use The term is common in everyday contexts, often relating to small-scale changes. They made some alterations to the event schedule. Pro Tip 2/2Beyond Clothing 'Alteration' isn't limited to tailoring; it applies to any modification. Our plans for the weekend required some alterations due to the weather.