Meaning of thereupon

there•up•on

Pronunciation: (âr'u-pon", -pôn", âr"u-pon', -pôn'), [key]
— adv.
  1. immediately following that.
  2. in consequence of that.
  3. upon that or it.
  4. with reference to that.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.