Whereat
ahd-5
conjunction.
Toward or at which.
conjunction.
As a result or consequence of; whereupon.
The Century Dictionary and Cyclopedia
At what? as,
whereat
are you offended?
At which.
the GNU version of the Collaborative International Dictionary of English
adverb.
At which; upon which; whereupon; -- used relatively.
adverb.
At what; -- used interrogatively; as,
whereat
are you offended?
Wiktionary, Creative Commons Attribution/Share-Alike License
conjunction.
at which, or toward which
conjunction.
because of which;
whereupon