Slider/ˈslaɪdər/ Definition 1 of 5Pro Tip 1/2Size Matters Sliders are miniature versions of larger food items, served in smaller portions. The party platter had an assortment of sliders, perfect for snacking. Pro Tip 2/2Casual Dining Sliders are commonly associated with casual dining settings and social gatherings. We had a variety of sliders at our backyard BBQ.