Smuggle/ˈsmʌɡl/ Definition 1 of 3Pro Tip 1/3Illegal Activity Smuggling always involves breaking the law, often with serious consequences. They ran an operation smuggling contraband cigarettes. Pro Tip 2/3Secretive Actions The act of smuggling is done in secret to avoid detection by authorities. Smugglers use hidden compartments to smuggle goods. Pro Tip 3/3Border Importance Smuggling often occurs at borders where goods are checked and regulated. She was arrested for trying to smuggle jewelry across the border.