Pronunciation:  US [ˌes 'aɪ] UK [ˌes 'aɪ]
  • abbr.The international system of units (from the French Système International)
  • n."Music" the major scale the seventh tone
  • WebSI (silicon) and SI (System International); the Silicon
[ Chemistry](= silicon) 

This page is created to explain what the meaning of si is. Here, you can find complete definitions of si in English and other 40 languages. First of all, you can listen to the pronunciations of si in American English and British English by clicking the audio icons. Next, we list the most popular web definitions of si. Though they may not be accurate, but represent the most up-to-date explanations in the Internet age. Furthermore, we list other words that have the same meanings as si. In addition to synonyms, major antonyms for si are also listed. For detailed word list, you can click tabs to switch between synonyms and antonyms. More importantly, you will see the tab of 'Definitions in English' where the dictionary provides the accurate meanings of si. Thirdly, we list other word forms of si: noun, adjective, verb, and adverb. Fourth, we are giving example sentences that contain si. These sentences show how you can use the English word of si in a real sentence. Fifth, to help you better understand the definitions of si, we also present three images to illustrate what si really means. Finally, we are listing English words that start with si, English words that contain si, and English words that end with si.