home run [hɔʊːm ɹʌn] noun6 •A four-base hit, allowing the batter to circle the bases and reach home safely in one play without any errors being committed by the defensive team.The first baseman hit a home run to lead off the ninth. •(figurative) A success, especially a popular success.The product was a home run. •(slang, figurative) Sexual intercourse. •The portion of a journey that ends at home.I'm on the home run. •A connection from a central distribution point or circuit breaker to a destination. •A three-base hit, a legal hit where the batter gets to third base without stopping illegally and without the opposing team attempting to put the batter out on earlier bases, scoring one run immediately. formshome runs