अद्वैत

Etymology
.

Noun

 * 1) absolute oneness, one without a second, non-duality
 * 2) monism

Proper noun

 * 1)  advaita vedanta a branch of Hinduism

Adjective

 * 1) non-dual (, etc.)
 * 2) unrivalled
 * 3) unique

Noun

 * , a non dualistic philosophy in Hinduism.

Usage notes
In the instrumental singular, it has the adverbial value of "only."