(1) Of or pertaining to or being on the receiving end of a discharge across a synapse.
(2) Pertaining to or relating to the distal side of a synapse.
The term is used especially to refer to a receiving or distal side of a synapse such as a postsynaptic cell, which can be a nerve cell (neuron), a muscle cell or a secretory (gland) cell.
Word origin: post- (behind, after) + synaptic » synapse.
See also: synapse.