chief ‧ ly /ˈtʃiːfli/ BrE AmE adverb
mostly but not completely SYN mainly :
The work consists chiefly of interviewing the public.
I lived abroad for years, chiefly in Italy.
chief ‧ ly /ˈtʃiːfli/ BrE AmE adverb
mostly but not completely SYN mainly :
The work consists chiefly of interviewing the public.
I lived abroad for years, chiefly in Italy.
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012