A snack was food consumed by someone usually between breakfast, lunch, or dinner. They were often served in snack bars. (ENT: "The Breach")
In 2024, there was a vending machine at the Clinica Las Mariposas in Los Angeles that had a large variety of snacks, such as potato chips, tortilla chips, peanuts and candy. (PIC: "Monsters")
In 2257, snacks were one of many foods that were vomited out by the food synthesizer in the USS Discovery's mess hall when Po was hiding from Ensign Sylvia Tilly. (ST: "Runaway")
In 2381, the Pakleds that were occupying Karzill IV had some snacks for them to eat. They consisted of cheese ball puffs and jerky.
When the away team from the USS Titan were disguised as miners and spotted close to the snacks by one of the Pakleds, the Pakleds believed that they were miners that were trying to steal their snacks. (LD: "Kayshon, His Eyes Open")