English to English

noun (n)

• a string of characters beginning with a period and followed by one or more letters; the optional second part of a PC computer filename

  serangkaian aksara diawali dengan tempoh dan diikuti oleh satu huruf atau lebih; the second part of a opsyenal pc komputer namafail

  Example:
  Most BASIC files use the filename extension .BAS.
  

  Synonym:
  extension, file name extension
  

  source: wordnet30