Definition of unmattered in English:

unmattered

Pronunciation /(ˌ)ʌnˈmatəd/

adjective

  • Having no matter; not embodied in matter; immaterial, intangible. Now chiefly Philosophy.

Origin

Mid 17th century; earliest use found in John Hall (bap. 1627, d. 1656), poet and writer. From un- + mattered.