1. chiefly - Adjective
2. chiefly - Adverb
In the first place; principally; preeminently; above; especially.
For the most part; mostly.
Source: Webster's dictionaryhe is mainly interested in butterflies Source: Internet
A 1953 government report on mountain areas stated that its aims were chiefly to promote Mandarin to strengthen a national outlook and create good customs. Source: Internet
A complex set of biochemical reactions regulates the oxidation of LDL particles, chiefly stimulated by presence of necrotic cell debris and free radicals in the endothelium. Source: Internet
Adoption In North America Video CDs were unable to gain acceptance as a mainstream format in North America, chiefly because the established VHS format was less expensive, offered comparable video quality, and could be recorded over. Source: Internet
A few of these are now chiefly found, or have been more productive, outside of the U.S.; for example, jump, "to drive past a traffic signal;" block meaning "building," and center, "central point in a town" or "main area for a particular activity" (cf. Source: Internet
After 1880 immigration reduced, and growth was due chiefly to the excess of births over deaths. Source: Internet