Synthesis means to bring ideas together, or to make something out of parts which were independent. It is the opposite of analysis.

• As an intellectual activity, synthesis occurs often in philosophy and science. In philosophy, synthesis is the end of a process of argument. Two examples of people whose work was mostly synthesis are:
  • Charles Darwin
  • Herbert Spencer

• In chemistry, to synthesize is to make new compounds from simpler elements.
• In acoustics, speech synthesis is the artificial production of human speech.