Archaic Following that immediately; thereupon.(adverb)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "thereon" in a sentence
"Then he gave orders to sweep a bench behind the door and, spreading on it a sitting-rug and a leather-cloth, seated Nur al-Din thereon and loosed his shackles and entreated him kindly."
"Except that, with a speed which denied his lazy air, while she and Hugo were making their devoirs, he had taken her dance card from her nerveless fingers and scribbled his name thereon, using the little pencil attached."
"No other record of the receipt of such a request and the action taken thereon is required."