Question

What is synaptic cleft

Answer 1

Medical Definition of Synaptic Cleft  

: the space between neurons at a nerve synapse across which a nerve impulse is transmitted by a neurotransmitter

— called also synaptic gap

Answer 2

It is formed by the membranes of a pre-synaptic neuron and a post-synaptic neuron and may or may not be separated by synaptic cleft.