Highball/ˈhaɪbɔːl/ Definition 1 of 4Pro Tip 1/2Drink context The term 'highball' often appears on bar menus or when discussing drinks. I noticed 'highball' listed under classic cocktails. Pro Tip 2/2Social gatherings 'Highball' may be referenced at social events where cocktails are served. At the party, guests were enjoying highballs on the terrace.