Definition of roll something up in English:

roll something up

phrasal verb

Military
  • Drive the flank of an enemy line back and round so that the line is shortened or surrounded.

    • ‘We had arrived in a great position to roll them up from the flank.’
    • ‘The most dangerous situation is to be drawn deep in among buildings where the enemy can ambush the attack and roll it up.’
    • ‘Unable to roll the line up, Rommel needed to break through it to get supplies to his armour, fighting hard to its east.’