n. The being the same; oneness; the negation of otherness; identity: as, the sameness of an unchangeable being.n. Essential resemblance; oneness of nature: as, a sameness of manner.n. Want of variety; tedious monotony: as, the sameness of objects in a landscape.n. Synonyms and Sameness, Identity. Sameness may be internal or external; identity is internal or essential: as, sameness of personal appearance; the identity of Saladin with Ilderim and Adonbec. One book may be the same as another, but cannot be identical with it. Saladin and Ilderim and Adonbec were the same man.