n. A putting of two or more things together; composition; specifically, the combination of separate elements or objects of thought into a whole, as of simple into compound or complex conceptions, and individual propositions into a system; also, a process of reasoning advancing in a direct manner from principles established or assumed, and propositions already proved, to the conclusion: the opposite of analysis.n. Specifically— In grammar, the combination of radical and formative elements into one word, as distinguished from their maintenance in the condition of separate words. See synthetic, 2.n. In surgery, an operation by which divided parts are united.n. In chem., the uniting of elements into a compound; composition or combination: the opposite of analysis, which is the separation of a compound into its constituent parts: as, that water is composed of oxygen and hydrogen is proved both by analysis and by synthesis.n. In acoustics, the combining of two or more simple sounds of different pitch, as those of several tuning-forks to produce or imitate a certain compound sound, as, for example, that of a piano-string.n. See the adjectives.n. In Rom, antiq., a short garment, not known by any representations, worn instead of the toga at the Saturnalia and commonly at banquets.n. In chem., the union of two compound bodies to form a more complex one.