adv
conj
Freq #248682
Meanings
-
1
adv
at which place or thing; at what, in formal or archaic use
They reached the gate whereat the old road once entered the town.
-
2
conj
because of which event or statement; whereupon
The proposal was rejected, whereat several members left the meeting.
Thesaurus
Etymology
From Middle English wherat, a transparent compound of where + at. Like whereon and wherein, it combines a relative or interrogative where-form with a preposition; its extended connective sense means "because of which" or "whereupon."