Definition of at cost:
(v) :
to approach and speak to boldly or aggressively, as with a demand or request; to join side to side; to border; hence, to sail along the coast or side of
"so much [of Lapland] as accosts the sea. - Fuller"
Definition of at cost:
(v) :
to approach and speak to boldly or aggressively, as with a demand or request; to join side to side; to border; hence, to sail along the coast or side of
"so much [of Lapland] as accosts the sea. - Fuller"