Sviridov’s 2nd Guards Mechanized Corps, advanced south of Budapest from small bridgeheads over the Danube River, which the Soviets had seized in late November. From there, this second force secured Székesfehérvár and Esztergom, west of Budapest. (book: When Titans Clashed)
What does "secured" mean, captured? I cannot bring it into alignment with dictionaries.