Definition of "whereat" []

• Toward or at which. (conjunction)
• As a result or consequence of; whereupon. (conjunction)

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.

• "On the lower shelves were enormous folios, on whose backs I spelled in black letters, 'Lightfoot Opera,' a title whereat I wondered, considering the bulk of the volumes."
• "There on the lower shelves were great enormous folios, on whose backs she spelled in black letters, "Lightfooti Opera," a title whereat she marveled, considering the bulk of the volumes."
• "A chemical element was thought of by Lavoisier as "the actual term whereat analysis has arrived," a definite substance "which we cannot subdivide with our present knowledge," but not necessarily a substance which will never be divided."