Under US law, a work must be fixed in order to receive copyright protection. The work must be “fixed in any tangible medium of expression, now known or later developed, from which [it] can be perceived, reproduced, or otherwise communicated, either directly or indirectly with the aid of a machine or device.” 17 U.S.C. § 102(a).
Pronunciation: /fɪkˈsʃən/