Ens \Ens\, n. [L., ens, entis, a thing. See Entity.]

1. (Metaph.) Entity, being, or existence; an actually existing being; also, God, as the Being of Beings.

2. (Chem.) Something supposed to condense within itself all the virtues and qualities of a substance from which it is extracted; essence. [Obs.]

Source: Webster's Revised Unabridged Dictionary (1913)