Besides/bɪˈsaɪdz/ Definition 1 of 4Pro Tip 1/2Additional Qualities Use 'besides' to highlight more than one skill or interest someone has. She's a skilled photographer; besides, she writes beautiful poetry. Pro Tip 2/2Not Just One 'Besides' signals that what follows is an addition to what has already been mentioned. Besides his teaching job, he volunteers at the hospital.