Definition of synths:
(n) :
(slang) A musical synthesizer.
(v) :
(slang) To play on a musical synthesizer.
(v) :
Synonym of synthesize.
(n) :
(science fiction) A synthetic humanoid, an android, a robot, a clone
(n) :
(furry fandom) A fictional reptilian android species.
(adj) :
Abbreviation of synthetic. [Of, or relating to synthesis.]