Definify.com

Webster 1913 Edition

Noun.

[L.

extantia

exstantia

, a standing out, fr.

exstans

, p. pr. See

Outward existence.

[Obs.]

Sir T. Browne.

Noun.

[L. estans.] Outward existence. [Not used.]

extance ‎(plural extances)

(obsolete, rare) emergence
- 1682, Sir Thomas Browne, Christian Morals
  He […] who hath in his intellect the ideal existences of things and entities before their extances.