Gab/ɡæb/ Definition 1 of 2Pro Tip 1/3Colloquial Use Used in casual conversation among friends or family, not in formal settings. At the family reunion, everyone gabbed about their lives. Pro Tip 2/3No Serious Topics 'Gab' implies the conversation topics are light and not very serious. They gabbed about the latest TV shows and fashion trends. Pro Tip 3/3Time Duration The term often suggests a lengthy conversation, potentially longer than some find comfortable. During the long car ride, they wouldn't stop gabbing.