From possession +‎ -less.

• (UK) IPA^(key): /pəˈzɛʃ.ən.ləs/

possessionless (comparative more possessionless, superlative most possessionless)

1. Without possessions.
   • 1915, Katherine Susan Anthony, Feminism in Germany and Scandinavia‎^[1], page 148:

     This is, of course, only one of the many instances in which the interests of the possessionless sex and the possessionless class tend to coincide.

   • 1981, Jamnalal Jain, transl., Dharma Ke Dasha Lakshana: Ten Characteristics of Religion‎^[2], translation of original by Hukamacanda Bhārilla, page 23:

     Similarly, the naked, possessionless saints who observe complete vows of the […]

   • 2001, Stephen Brown, Imagining Marketing: Art, Aesthetics and the Avant-Garde‎^[3], →ISBN, page 4:

     A multi-millionaire rock star sings about a possessionless world […]

• Oxford English Dictionary, 2nd ed., 1989.