"read-only." YourDictionary, n.d. Web. 18 December 2018. <https://www.yourdictionary.com/read-only>.
read-only. (n.d.). Retrieved December 18th, 2018, from https://www.yourdictionary.com/read-only
Unalterable, capable of being read but not written. Especially common in computer terms such as read-only memory and read-only access to files or directories (in in file system permissions or programs).
English Wiktionary. Available under CC-BY-SA license.