Oneness may refer to:
Religion and philosophy Holism Nondualism Henosis, a concept in Greek mysticism denoting "oneness" or "unity" Monism, a metaphysical concept in philosophy Meditative absorption, oneness, Samadhi Monotheism, the belief that only one deity exists Divine simplicity, doctrine that holds God is without parts Tawhid, Islam's fundamental concept that God is one and single The three oneness, three core assertions in the Baháʼí teachings#Unity Oneness Pentecostalism, a movement of nontrinitarian denominations Systems thinking
Economy Law of one price (LoP), an economic concept which posits that "a good must sell for the same price in all locations".
Media, arts and entertainment OneNess, a poet/singer/entertainer (see Poet in the City) Oneness idents, used by BBC One TV station between 2017 and 2022 Oneness (film), a 2024 Indian Meitei-language film
In music Oneness (Carlos Santana album), a 1979 rock album GodWeenSatan: The Oneness, the 1990 debut album by American rock band Ween Oneness (Jack DeJohnette album), a 1997 jazz album
See also One (disambiguation)