1. In a vertical direction
   "a gallery quite often is added to make use of space vertically as well as horizontally"

See also: vertical

• backhanded
• backhander
• backhaul
• backhoe
• backing
• backlash
• backless
• backlight
• backlighting
• backlog
• backmost
• backorder
• backpack
• backpacker
• backpacking
• backpacking tent
• backpedal
• backplate
• backrest
• backroom
• backroom boy
• backsaw
• backscatter
• backscratcher
• backseat