synthesizer

[sin-thuh-sahy-zer]
noun
  1. a person or thing that synthesizes.
  2. any of various electronic, sometimes portable consoles or modules, usually computerized, for creating, modifying, and combining tones or reproducing the sounds of musical instruments by controlling voltage patterns, operated by means of keyboards, joysticks, sliders, or knobs.

Origin of synthesizer

1865–70; 1905–10, for def 2; synthesize + -er1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for synthesizer

synthesizer

noun
  1. an electrophonic instrument, usually operated by means of a keyboard and pedals, in which sounds are produced by voltage-controlled oscillators, filters, and amplifiers, with an envelope generator module that controls attack, decay, sustain, and release
  2. a person or thing that synthesizes
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for synthesizer
v.

1869, agent noun from synthesize. As a type of musical instrument, from 1909; the electronic version is from 1950s.

Online Etymology Dictionary, © 2010 Douglas Harper