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syno|nym /s I nən I m/ (synonyms ) N‑COUNT A synonym is a word or expression which means the same as another word or expression. □ [+ for ] The term 'industrial democracy' is often used as a synonym for worker participation.

syn|ony|mous /s I nɒ n I məs/ ADJ [usu v-link ADJ ] If you say that one thing is synonymous with another, you mean that the two things are very closely associated with each other so that one suggests the other or one cannot exist without the other. □ [+ with ] Paris has always been synonymous with elegance, luxury and style.

syn|op|sis /s I nɒ ps I s/ (synopses /s I nɒ psiːz/) N‑COUNT A synopsis is a summary of a longer piece of writing or work. □  For each title there is a brief synopsis of the book.

syn|tac|tic /s I ntæ kt I k/ ADJ [ADJ n] Syntactic means relating to syntax. [TECHNICAL ] □  …three common syntactic devices in English.

syn|tax /s I ntæks/ N‑UNCOUNT Syntax is the ways that words can be put together, or are put together, in order to make sentences. [TECHNICAL ] □  His grammar and syntax, both in oral and written expression, were much better than the average.

synth /s I nθ/ (synths ) N‑COUNT A synth is the same as a synthesizer . [INFORMAL ]

syn|the|sis /s I nθ I s I s/ (syntheses /s I nθ I siːz/)

1 N‑COUNT [usu sing] A synthesis of different ideas or styles is a mixture or combination of these ideas or styles. [FORMAL ] □ [+ of ] His novels are a rich synthesis of Balkan history and mythology.

2 N‑VAR The synthesis of a substance is the production of it by means of chemical or biological reactions. [TECHNICAL ] □  …the genes that regulate the synthesis of these compounds.

syn|the|size /s I nθ I sa I z/ (synthesizes , synthesizing , synthesized ) in BRIT, also use synthesise 1 VERB To synthesize a substance means to produce it by means of chemical or biological reactions. [TECHNICAL ] □ [V n] After extensive research, Albert Hoffman first succeeded in synthesizing the acid in 1938.

2 VERB If you synthesize different ideas, facts, or experiences, you combine them to form a single idea or impression. [FORMAL ] □ [V n] The movement synthesised elements of modern art that hadn't been brought together before, such as Cubism and Surrealism.

syn|the|sized /s I nθ I sa I zd/ in BRIT, also use synthesised ADJ [ADJ n] Synthesized sounds are produced electronically using a synthesizer. □  …synthesised dance music.

syn|the|siz|er /s I nθ I sa I zə ^r / (synthesizers ) in BRIT, also use synthesiser N‑COUNT A synthesizer is an electronic machine that produces speech, music, or other sounds, usually by combining individual syllables or sounds that have been previously recorded. □  Now he can only communicate through a voice synthesiser.

syn|thet|ic /s I nθe t I k/ ADJ [usu ADJ n] Synthetic products are made from chemicals or artificial substances rather than from natural ones. □  Boots made from synthetic materials can usually be washed in a machine. □  …synthetic rubber. ●  syn|theti|cal|ly ADV [ADV with v] □  …the therapeutic use of natural and synthetically produced hormones.

syn|thet|ics /s I nθe t I ks/ N‑PLURAL You can refer to synthetic clothing, fabric, or materials as synthetics . □  Natural fabrics like silk and wool are better insulators than synthetics.

syphi|lis /s I f I l I s/ N‑UNCOUNT Syphilis is a serious disease which is passed on through sexual intercourse.

sy|phon /sa I f ^ə n/ → see siphon

Syr|ian /s I riən/ (Syrians )

1 ADJ Syrian means belonging or relating to Syria, or to its people or culture.