transmit the sensory impulse to the appropriate part of the brain or spinal cord for interpretation and processing; also known as association neurons.
depth. 1  the distance from the top downward, from the surface inward, or from front to back. 2  perspective, as in a painting. 3  the quality or condition of being deep; deepness; specif., 4  intensity, as of colors, silence, or emotion.
Definition of depth for Students. 1  1 : measurement from top to bottom or from front to back a cupboard's depth. 2  2 : a place far below a surface or far inside something (as a sea or a forest) Some unusual fish live at great depths. 3  3 : the middle of time the depth of winter.