Definition of here-at:
(adv) :
(location) In, on, or at this place (a place perceived to be close to the speaker); compare there.
(adv) :
(abstract) At this point or stage (in a process, argument, narration, etc.)
(n) :
This place; this location.
(adv) :
(abstract) In this matter.
(adv) :
(abstract) In this context.
(adv) :
(as complement of 'be') Notionally at the speaker's location by virtue of happening now.