(military) An advance through and past enemy lines.
Any major progress; such as a great innovation or discovery that overcomes a significant obstacle.Albert Einstein is credited with making some of the greatest breakthroughs in .
(sports) The penetration of the opposition defence
2011, September 29, Jon Smith, Tottenham 3 - 1 Shamrock Rovers, But with the lively Dos Santos pulling the strings behind strikers Pavlyuchenko and Defoe, Spurs controlled the first half without finding the breakthrough their dominance deserved.