Terms of orientation, terms of location, or spatial words are common linguistic descriptors used to indicate the spatial positioning of objects in three-dimensional space, including notions of top, bottom, front, back, left side, and right side as used in everyday language and interactions. Assigning these to objects then allows things to be described in relation to the object, above, below, in front of, behind, beside, and so forth.

Body relative directions are geometrical orientations relative to a body such as a human person's body or a road sign. The most common ones are: left and right; forward and backward; up and down. They form three pairs of orthogonal axes.