Dip is the angle that a planar geologic surface (for example, a fault) is inclined from the horizontal.

Directivity is an effect of a fault rupturing whereby earthquake ground motion in the direction of rupture propagation is more severe than that in other directions from the earthquake source.

Displacement is the difference between the initial position of a reference point and any later position. The amount any point affected by an earthquake has moved from where it was before the earthquake.

Deformation is a change in the original shape of a material. When we are talking about earthquakes, deformation is due to stress and strain.