Aid Climbing involves climbing by inserting climbing hardware into weaknesses in the rock and pulling on them.  The hardware can be standard climbing gear that can be removed by hand or that needs to be hammered in and hammered to be removed.  It is different to 'free' climbing where you use your body to ascend the rock and hardware is us [..]

Ascending a wall by using protection points to make progress (as opposed to free climbing).

  Using protective gear to aid in upward progress; pulling on a quickdraw or using aiders, for example.  This is done to overcome a section that is either too difficult or time consuming to free-climb [..]

(climbing) a type of rock climbing characterized by using equipment to make upward progress, as opposed to using the equipment solely for safety or for belays.

Climbing using gear for resting or making progress. Covers everything from a brief rest on the rope on an otherwise traditional1 ascent to bolt ladders and étriers.