IDIOMS

leave behind

(transitive) To pass.

Example: Used other than as an idiom: see leave,‎ behind.
  We left behind our luggage at the hotel.
  We (accidentally) left behind our bags at the airport.
  Mrs Johnston died at thirty, and left behind three young daughters.
  The wound I got in my car accident left behind a massive scar.
  Unfortunately, this cleaning product leaves behind a noticeable residue.
  This product leaves behind all its competitors in the market.
  As soon as we made our way onto the highway, we left the skyscrapers behind us.