to push something open or spread it out; to expand by pushing (e.g. unfold, spread something by pressing, make space by pushing through).
赤ちゃんの毛布を押し広げて、寝かせる場所を作った。
I pushed the baby's blanket aside to make a place to lie them down.
混雑した店内で、友人のために道を押し広げた。
In the crowded shop I pushed people aside to make a way for my friend.
地図をテーブルに押し広げて、行き先を確認した。
I spread the map out on the table and checked the route.