Top Definition
Chemical synapses are specialized junctions through which neurons signal to each other and to non-neuronal cells such as those in muscles or glands. Chemical synapses allow neurons to form interconnected circuits within the central nervous system. They are thus crucial to the biological computations that underlie perception and thought. They provide the means through which the nervous system connects to and controls the other systems of the body, for example the specialized synapse between a motor neuron and a muscle cell is called a neuromuscular junction.

In popular culture, "synapse" is often used to describe a thought in a most artistic form, or even a "jerk reaction" to a certain stimuli.
"Synapse to synapse, the possibilities thin."
-Ben Gibbard
by Jason Re. June 19, 2008

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The motion of a fist-bumping someone without physically touching fists with them. Refers to the neurological connection of the same name.
>>Dude, I just got laid

>>*Synapse*
by kutless429 December 21, 2010

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Something to say when you have a senior moment or forget something. An expression of exasperation at oneself.
Synapse! I missed my dad's birthday!
by Sharonssunology March 16, 2012

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