Verb
(idiomatic, transitive) To steal or abscond with.
He ran off with my wallet.
(idiomatic, transitive) To elope; to leave with (someone) with the intention of living with them or marrying them.
The chief accountant has run off with his secretary!
Plot Private detectives Sam Spade and Miles Archer are hired by an attractive young woman, "Miss Wonderly", to follow a man, Floyd Thursby, who has allegedly run off with her younger sister, Corinne. Source: Internet
Ben: “Any chance I can ditch these crazies and run off with Alex Morgan? Source: Internet
Torn between his devotion to the church and his desire to run off with Averill, he prays fervently for guidance, and for God to give him a Sign. Source: Internet
Luis discovers Julia has run off with nearly all of his fortune, and then teams up with a detective, Walter Downs ( Thomas Jane ), hired by Emily to find her real sister Julia. Source: Internet
Their reacquaintance is cut short, however, by the news that Lydia has run off with Mr. Wickham. Source: Internet